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rlsa-2026:65334
Vulnerability from osv_rocky
Published
2026-09-10 00:09
Modified
2026-09-10 18:12
Summary
Important: kernel security, bug fix, and enhancement update
Details
The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
-
kernel: KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation (CVE-2026-43133)
-
kernel: Bluetooth: SMP: force responder MITM requirements before building the pairing response (CVE-2026-43334)
-
kernel: Bluetooth: virtio_bt: clamp rx length before skb_put (CVE-2026-46123)
-
kernel: Bluetooth: serialize accept_q access (CVE-2026-52918)
-
kernel: net: pull headers in qdisc_pkt_len_segs_init() (CVE-2026-53091)
-
kernel: Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER (CVE-2026-53072)
-
kernel: net: qrtr: fix refcount saturation and potential UAF in qrtr_port_remove (CVE-2026-52947)
-
kernel: Bluetooth: RFCOMM: hold listener socket in rfcomm_connect_ind() (CVE-2026-53256)
-
kernel: wifi: nl80211: reject oversized EMA RNR lists (CVE-2026-53182)
-
kernel: Bluetooth: hci_sync: reject oversized Broadcast Announcement prepend (CVE-2026-53209)
-
kernel: Bluetooth: RFCOMM: validate skb length in MCC handlers (CVE-2026-53254)
-
kernel: vfio/pci: Clean up DMABUFs before disabling function (CVE-2026-53322)
-
kernel: Bluetooth: L2CAP: Fix possible crash on l2cap_ecred_conn_rsp (CVE-2026-63975)
-
kernel: security/keys: fix missed RCU read section on lookup (CVE-2026-64015)
-
kernel: Bluetooth: HIDP: fix missing length checks in hidp_input_report() (CVE-2026-63947)
-
kernel: Bluetooth: hci_sync: fix UAF in hci_le_create_cis_sync (CVE-2026-63944)
-
kernel: Bluetooth: ISO: fix UAF in iso_recv_frame (CVE-2026-63946)
-
kernel: wifi: mac80211: capture fast-RX rate before mesh reuses skb->cb (CVE-2026-64117)
-
kernel: wifi: iwlwifi: mld: fix TSO segmentation explosion when AMSDU is disabled (CVE-2026-64037)
-
kernel: ixgbevf: fix use-after-free in VEPA multicast source pruning (CVE-2026-64113)
-
kernel: vfio/pci: Check BAR resources before exporting a DMABUF (CVE-2026-64042)
-
kernel: accel/qaic: Add overflow check to remap_pfn_range during mmap (CVE-2026-64051)
-
kernel: wifi: iwlwifi: mld: validate sta_mask before ffs() in BA session handlers (CVE-2026-64255)
-
kernel: wifi: mac80211: fix MLE defragmentation (CVE-2026-64515)
-
kernel: wifi: mac80211: defer link RX stats percpu free to RCU (CVE-2026-68409)
-
kernel: wifi: mt76: mt7925: fix crash in reset link replay (CVE-2026-68307)
-
kernel: wifi: mt76: mt7925: drop TXRX_NOTIFY on non-mmio buses (CVE-2026-68193)
-
kernel: dm-verity: fix buffer overflow in FEC calculation (CVE-2026-72098)
-
kernel: nvmet-rdma: handle inline data with a nonzero offset (CVE-2026-72129)
Bug Fix(es) and Enhancement(s):
- rtla-timerlat-top doesn't stop properly when threshold is reached on multiple CPUs at once [rhel-10.2.z] (JIRA:Rocky Linux-193027)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Severity
8.1 (High)
References
{
"affected": [
{
"package": {
"ecosystem": "Rocky Linux:10",
"name": "kernel",
"purl": "pkg:rpm/rocky-linux/kernel?distro=rocky-linux-10\u0026epoch=0"
},
"ranges": [
{
"database_specific": {
"yum_repository": "BaseOS"
},
"events": [
{
"introduced": "0"
},
{
"fixed": "0:6.12.0-211.53.1.el10_2"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"credits": [
{
"name": "Rocky Enterprise Software Foundation"
},
{
"name": "Red Hat"
}
],
"database_specific": {
"license": "CC-BY-4.0",
"license_url": "https://creativecommons.org/licenses/by/4.0/",
"source_advisory": "RHSA-2026:65334"
},
"details": "The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation (CVE-2026-43133)\n\n* kernel: Bluetooth: SMP: force responder MITM requirements before building the pairing response (CVE-2026-43334)\n\n* kernel: Bluetooth: virtio_bt: clamp rx length before skb_put (CVE-2026-46123)\n\n* kernel: Bluetooth: serialize accept_q access (CVE-2026-52918)\n\n* kernel: net: pull headers in qdisc_pkt_len_segs_init() (CVE-2026-53091)\n\n* kernel: Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER (CVE-2026-53072)\n\n* kernel: net: qrtr: fix refcount saturation and potential UAF in qrtr_port_remove (CVE-2026-52947)\n\n* kernel: Bluetooth: RFCOMM: hold listener socket in rfcomm_connect_ind() (CVE-2026-53256)\n\n* kernel: wifi: nl80211: reject oversized EMA RNR lists (CVE-2026-53182)\n\n* kernel: Bluetooth: hci_sync: reject oversized Broadcast Announcement prepend (CVE-2026-53209)\n\n* kernel: Bluetooth: RFCOMM: validate skb length in MCC handlers (CVE-2026-53254)\n\n* kernel: vfio/pci: Clean up DMABUFs before disabling function (CVE-2026-53322)\n\n* kernel: Bluetooth: L2CAP: Fix possible crash on l2cap_ecred_conn_rsp (CVE-2026-63975)\n\n* kernel: security/keys: fix missed RCU read section on lookup (CVE-2026-64015)\n\n* kernel: Bluetooth: HIDP: fix missing length checks in hidp_input_report() (CVE-2026-63947)\n\n* kernel: Bluetooth: hci_sync: fix UAF in hci_le_create_cis_sync (CVE-2026-63944)\n\n* kernel: Bluetooth: ISO: fix UAF in iso_recv_frame (CVE-2026-63946)\n\n* kernel: wifi: mac80211: capture fast-RX rate before mesh reuses skb-\u003ecb (CVE-2026-64117)\n\n* kernel: wifi: iwlwifi: mld: fix TSO segmentation explosion when AMSDU is disabled (CVE-2026-64037)\n\n* kernel: ixgbevf: fix use-after-free in VEPA multicast source pruning (CVE-2026-64113)\n\n* kernel: vfio/pci: Check BAR resources before exporting a DMABUF (CVE-2026-64042)\n\n* kernel: accel/qaic: Add overflow check to remap_pfn_range during mmap (CVE-2026-64051)\n\n* kernel: wifi: iwlwifi: mld: validate sta_mask before ffs() in BA session handlers (CVE-2026-64255)\n\n* kernel: wifi: mac80211: fix MLE defragmentation (CVE-2026-64515)\n\n* kernel: wifi: mac80211: defer link RX stats percpu free to RCU (CVE-2026-68409)\n\n* kernel: wifi: mt76: mt7925: fix crash in reset link replay (CVE-2026-68307)\n\n* kernel: wifi: mt76: mt7925: drop TXRX_NOTIFY on non-mmio buses (CVE-2026-68193)\n\n* kernel: dm-verity: fix buffer overflow in FEC calculation (CVE-2026-72098)\n\n* kernel: nvmet-rdma: handle inline data with a nonzero offset (CVE-2026-72129)\n\nBug Fix(es) and Enhancement(s):\n\n* rtla-timerlat-top doesn\u0027t stop properly when threshold is reached on multiple CPUs at once [rhel-10.2.z] (JIRA:Rocky Linux-193027)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
"id": "RLSA-2026:65334",
"modified": "2026-09-10T18:12:41.738819Z",
"published": "2026-09-10T00:09:11.134895Z",
"references": [
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"url": "https://errata.rockylinux.org/RLSA-2026:65334"
},
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}
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"upstream": [
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"CVE-2026-43334",
"CVE-2026-46123",
"CVE-2026-52918",
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"CVE-2026-64037",
"CVE-2026-64042",
"CVE-2026-64051",
"CVE-2026-64113",
"CVE-2026-64117",
"CVE-2026-64255",
"CVE-2026-64515",
"CVE-2026-68193",
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"CVE-2026-68409",
"CVE-2026-72098",
"CVE-2026-72129"
]
}
CVE-2026-43133 (GCVE-0-2026-43133)
Vulnerability from cvelistv5 – Published: 2026-05-06 11:27 – Updated: 2026-09-10 12:04
VLAI
EPSS
VEX
Title
KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation
Summary
In the Linux kernel, the following vulnerability has been resolved:
KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation
Commit cc3ed80ae69f ("KVM: nSVM: always use vmcb01 to for vmsave/vmload
of guest state") made KVM always use vmcb01 for the fields controlled by
VMSAVE/VMLOAD, but it missed updating the VMLOAD/VMSAVE emulation code
to always use vmcb01.
As a result, if VMSAVE/VMLOAD is executed by an L2 guest and is not
intercepted by L1, KVM will mistakenly use vmcb02. Always use vmcb01
instead of the current VMCB.
Severity
7.9 (High)
CWE
- CWE-628 - Function Call with Incorrectly Specified Arguments
Assigner
References
12 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/10063e1251c148503… | |
| https://git.kernel.org/stable/c/c3b7015000988ba35… | |
| https://git.kernel.org/stable/c/3880e331b0b31d0d5… | |
| https://git.kernel.org/stable/c/fce2fd4a2ca05670a… | |
| https://git.kernel.org/stable/c/d464cf1ed900d47c8… | |
| https://git.kernel.org/stable/c/0004ecb798b30e90d… | |
| https://git.kernel.org/stable/c/127ccae2c185f62e6… | |
| https://access.redhat.com/security/cve/CVE-2026-43133 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2467065 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:65334 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:66180 | vendor-advisoryx_refsource_REDHAT |
Impacted products
10 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
cc3ed80ae69f454c3d904af9f65394a540099723 , < 10063e1251c1485034a018236080792ad083dcc5
(git)
Affected: cc3ed80ae69f454c3d904af9f65394a540099723 , < c3b7015000988ba35ecd5648f4b2283960f00543 (git) Affected: cc3ed80ae69f454c3d904af9f65394a540099723 , < 3880e331b0b31d0d5d3702b124f6c93539cd478a (git) Affected: cc3ed80ae69f454c3d904af9f65394a540099723 , < fce2fd4a2ca05670a91015aacccf96a1c26268fd (git) Affected: cc3ed80ae69f454c3d904af9f65394a540099723 , < d464cf1ed900d47c85393d40b00017b6adfc2e6c (git) Affected: cc3ed80ae69f454c3d904af9f65394a540099723 , < 0004ecb798b30e90d7ebfe74efae2d9423315a64 (git) Affected: cc3ed80ae69f454c3d904af9f65394a540099723 , < 127ccae2c185f62e6ecb4bf24f9cb307e9b9c619 (git) |
|
| Linux | Linux |
Affected:
5.13
Unaffected: 0 , < 5.13 (semver) Unaffected: 5.15.202 , ≤ 5.15.* (semver) Unaffected: 6.1.165 , ≤ 6.1.* (semver) Unaffected: 6.6.128 , ≤ 6.6.* (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.16 , ≤ 6.18.* (semver) Unaffected: 6.19.6 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix) |
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:6.12.0-211.53.1.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:5.14.0-687.46.1.el9_8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 cpe:/o:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
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CVE-2026-43334 (GCVE-0-2026-43334)
Vulnerability from cvelistv5 – Published: 2026-05-08 13:31 – Updated: 2026-08-05 12:27
VLAI
EPSS
VEX
Title
Bluetooth: SMP: force responder MITM requirements before building the pairing response
Summary
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: SMP: force responder MITM requirements before building the pairing response
smp_cmd_pairing_req() currently builds the pairing response from the
initiator auth_req before enforcing the local BT_SECURITY_HIGH
requirement. If the initiator omits SMP_AUTH_MITM, the response can
also omit it even though the local side still requires MITM.
tk_request() then sees an auth value without SMP_AUTH_MITM and may
select JUST_CFM, making method selection inconsistent with the pairing
policy the responder already enforces.
When the local side requires HIGH security, first verify that MITM can
be achieved from the IO capabilities and then force SMP_AUTH_MITM in the
response in both rsp.auth_req and auth. This keeps the responder auth bits
and later method selection aligned.
Severity
8.8 (High)
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/425a22c5373d4e1b4… | |
| https://git.kernel.org/stable/c/7ab69426e7ecbd18a… | |
| https://git.kernel.org/stable/c/01bb4045d2306c266… | |
| https://git.kernel.org/stable/c/91649c02c1baaa18c… | |
| https://git.kernel.org/stable/c/c8ff0ca6508535bcc… | |
| https://git.kernel.org/stable/c/fa14e0e19820b1bbd… | |
| https://git.kernel.org/stable/c/ec17efb1ef91506cf… | |
| https://git.kernel.org/stable/c/d05111bfe37bfd8bd… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
2b64d153a0cc9d2b60e47be013cde8490f16e0a5 , < 425a22c5373d4e1b46492ab869074ebeeade61f3
(git)
Affected: 2b64d153a0cc9d2b60e47be013cde8490f16e0a5 , < 7ab69426e7ecbd18a222ee2ec87ca612d30197d7 (git) Affected: 2b64d153a0cc9d2b60e47be013cde8490f16e0a5 , < 01bb4045d2306c266178f49ce0c3576d237a3040 (git) Affected: 2b64d153a0cc9d2b60e47be013cde8490f16e0a5 , < 91649c02c1baaa18cedf7fb425fa1f0f852c8183 (git) Affected: 2b64d153a0cc9d2b60e47be013cde8490f16e0a5 , < c8ff0ca6508535bccabd81c5c9dcc63de8a3d4fb (git) Affected: 2b64d153a0cc9d2b60e47be013cde8490f16e0a5 , < fa14e0e19820b1bbdb42185c9c4efa950bcffef9 (git) Affected: 2b64d153a0cc9d2b60e47be013cde8490f16e0a5 , < ec17efb1ef91506cfd17a77692eaf4bbacb520ea (git) Affected: 2b64d153a0cc9d2b60e47be013cde8490f16e0a5 , < d05111bfe37bfd8bd4d2dfe6675d6bdeef43f7c7 (git) |
|
| Linux | Linux |
Affected:
3.3
Unaffected: 0 , < 3.3 (semver) Unaffected: 5.10.253 , ≤ 5.10.* (semver) Unaffected: 5.15.203 , ≤ 5.15.* (semver) Unaffected: 6.1.168 , ≤ 6.1.* (semver) Unaffected: 6.6.134 , ≤ 6.6.* (semver) Unaffected: 6.12.81 , ≤ 6.12.* (semver) Unaffected: 6.18.22 , ≤ 6.18.* (semver) Unaffected: 6.19.12 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix) |
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"url": "https://git.kernel.org/stable/c/91649c02c1baaa18cedf7fb425fa1f0f852c8183"
},
{
"url": "https://git.kernel.org/stable/c/c8ff0ca6508535bccabd81c5c9dcc63de8a3d4fb"
},
{
"url": "https://git.kernel.org/stable/c/fa14e0e19820b1bbdb42185c9c4efa950bcffef9"
},
{
"url": "https://git.kernel.org/stable/c/ec17efb1ef91506cfd17a77692eaf4bbacb520ea"
},
{
"url": "https://git.kernel.org/stable/c/d05111bfe37bfd8bd4d2dfe6675d6bdeef43f7c7"
}
],
"title": "Bluetooth: SMP: force responder MITM requirements before building the pairing response",
"x_generator": {
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}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-43334",
"datePublished": "2026-05-08T13:31:20.923Z",
"dateReserved": "2026-05-01T14:12:56.002Z",
"dateUpdated": "2026-08-05T12:27:18.528Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
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}
CVE-2026-46123 (GCVE-0-2026-46123)
Vulnerability from cvelistv5 – Published: 2026-05-28 09:35 – Updated: 2026-08-05 12:29
VLAI
EPSS
VEX
Title
Bluetooth: virtio_bt: clamp rx length before skb_put
Summary
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: virtio_bt: clamp rx length before skb_put
virtbt_rx_work() calls skb_put(skb, len) where len comes directly
from virtqueue_get_buf() with no validation against the buffer we
posted to the device. The RX skb is allocated in virtbt_add_inbuf()
and exposed to virtio as exactly 1000 bytes via sg_init_one().
Checking len against skb_tailroom(skb) is not sufficient because
alloc_skb() can leave more tailroom than the 1000 bytes actually
handed to the device. A malicious or buggy backend can therefore
report used.len between 1001 and skb_tailroom(skb), causing skb_put()
to include uninitialized kernel heap bytes that were never written by
the device.
The same path also accepts len == 0, in which case skb_put(skb, 0)
leaves the skb empty but virtbt_rx_handle() still reads the pkt_type
byte from skb->data, consuming uninitialized memory.
Define VIRTBT_RX_BUF_SIZE once and reuse it in alloc_skb() and
sg_init_one(), and gate virtbt_rx_work() on that same constant so
the bound checked matches the buffer actually exposed to the device.
Reject used.len == 0 in the same gate so an empty completion can
no longer reach virtbt_rx_handle().
Use bt_dev_err_ratelimited() because the length value comes from an
untrusted backend that can otherwise flood the kernel log.
Same class of bug as commit c04db81cd028 ("net/9p: Fix buffer
overflow in USB transport layer"), which hardened the USB 9p
transport against unchecked device-reported length.
Severity
7.7 (High)
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/4236e55b2d9d1ffd3… | |
| https://git.kernel.org/stable/c/fd91fa2678ab603df… | |
| https://git.kernel.org/stable/c/ed41c81d30b211a67… | |
| https://git.kernel.org/stable/c/6c1730099a6fc18b1… | |
| https://git.kernel.org/stable/c/b40cdd1b1370d76e9… | |
| https://git.kernel.org/stable/c/e6b4296f170d949eb… | |
| https://git.kernel.org/stable/c/21bd244b6de5d2fe1… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
cf2719a21fdb9d4c8e9c834d279163609bef575d , < 4236e55b2d9d1ffd3b4bdf8ebbb86e5a0a526b4a
(git)
Affected: 160fbcf3bfb93c3c086427f9f4c8bc70f217e9be , < fd91fa2678ab603dfb285416c1cf3843d7be1e41 (git) Affected: 160fbcf3bfb93c3c086427f9f4c8bc70f217e9be , < ed41c81d30b211a671667259c3b5feeba0e062d5 (git) Affected: 160fbcf3bfb93c3c086427f9f4c8bc70f217e9be , < 6c1730099a6fc18b183bd6c1adad3b54adcaeda9 (git) Affected: 160fbcf3bfb93c3c086427f9f4c8bc70f217e9be , < b40cdd1b1370d76e9e760af4490cb4a351cceead (git) Affected: 160fbcf3bfb93c3c086427f9f4c8bc70f217e9be , < e6b4296f170d949ebba937cf6a3f247ec9550d2c (git) Affected: 160fbcf3bfb93c3c086427f9f4c8bc70f217e9be , < 21bd244b6de5d2fe1063c23acc93fbdd2b20d112 (git) Affected: 9b67438e315b925a699f0178f4a48baf3d2d6ef4 (git) Affected: 5.15.78 , < 5.15.209 (semver) Affected: 6.0.8 , < 6.1 (semver) |
|
| Linux | Linux |
Affected:
6.1
Unaffected: 0 , < 6.1 (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.88 , ≤ 6.12.* (semver) Unaffected: 6.18.30 , ≤ 6.18.* (semver) Unaffected: 7.0.7 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
{
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"cpeApplicability": [
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: virtio_bt: clamp rx length before skb_put\n\nvirtbt_rx_work() calls skb_put(skb, len) where len comes directly\nfrom virtqueue_get_buf() with no validation against the buffer we\nposted to the device. The RX skb is allocated in virtbt_add_inbuf()\nand exposed to virtio as exactly 1000 bytes via sg_init_one().\n\nChecking len against skb_tailroom(skb) is not sufficient because\nalloc_skb() can leave more tailroom than the 1000 bytes actually\nhanded to the device. A malicious or buggy backend can therefore\nreport used.len between 1001 and skb_tailroom(skb), causing skb_put()\nto include uninitialized kernel heap bytes that were never written by\nthe device.\n\nThe same path also accepts len == 0, in which case skb_put(skb, 0)\nleaves the skb empty but virtbt_rx_handle() still reads the pkt_type\nbyte from skb-\u003edata, consuming uninitialized memory.\n\nDefine VIRTBT_RX_BUF_SIZE once and reuse it in alloc_skb() and\nsg_init_one(), and gate virtbt_rx_work() on that same constant so\nthe bound checked matches the buffer actually exposed to the device.\nReject used.len == 0 in the same gate so an empty completion can\nno longer reach virtbt_rx_handle().\n\nUse bt_dev_err_ratelimited() because the length value comes from an\nuntrusted backend that can otherwise flood the kernel log.\n\nSame class of bug as commit c04db81cd028 (\"net/9p: Fix buffer\noverflow in USB transport layer\"), which hardened the USB 9p\ntransport against unchecked device-reported length."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.7,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The malicious value is the virtqueue used-buffer length supplied by the local virtio backend (host VMM / device-emulation process), reached over the virtio bus rather than the network stack or physical contact; virtio_bt exists only as a paravirtualized transport inside VM guests.\nAC:L - The backend fully and deterministically controls the reported `len`; choosing a value above tailroom reliably panics the guest and a value in (1000, tailroom] reliably exposes uninitialized heap, with no uncontrolled conditions.\nPR:N - The attacking device backend authenticates nothing and holds no privileges within the victim guest kernel, exactly as malicious-peripheral (USB) device bugs are scored PR:N in this tree.\nUI:N - The backend autonomously posts a crafted RX completion as soon as the device is opened; no guest-side user action is required.\nS:U - Both the vulnerable component and the impacted resources (guest kernel heap disclosure and guest kernel panic) reside within the guest kernel\u0027s security authority, so no scope boundary is crossed by the impact.\nC:H - An oversized `len` causes ~700 bytes of uninitialized kernel heap to be injected into the HCI receive path (observable via HCI monitor/raw sockets); this is an unbounded info leak, well beyond a few bytes.\nI:N - The bug only advances skb length/tail pointers and never grants an out-of-bounds write, UAF, or other primitive to modify kernel data beyond what a device can already do legitimately.\nA:H - A `len` exceeding skb tailroom drives `skb_put()` into `skb_over_panic()` \u2192 `BUG()`, giving the backend a reliable, repeatable guest kernel panic."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T12:29:52.762Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
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"url": "https://git.kernel.org/stable/c/4236e55b2d9d1ffd3b4bdf8ebbb86e5a0a526b4a"
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"url": "https://git.kernel.org/stable/c/fd91fa2678ab603dfb285416c1cf3843d7be1e41"
},
{
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{
"url": "https://git.kernel.org/stable/c/21bd244b6de5d2fe1063c23acc93fbdd2b20d112"
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],
"title": "Bluetooth: virtio_bt: clamp rx length before skb_put",
"x_generator": {
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"cveId": "CVE-2026-46123",
"datePublished": "2026-05-28T09:35:38.003Z",
"dateReserved": "2026-05-13T15:03:33.098Z",
"dateUpdated": "2026-08-05T12:29:52.762Z",
"state": "PUBLISHED"
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"dataType": "CVE_RECORD",
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CVE-2026-52918 (GCVE-0-2026-52918)
Vulnerability from cvelistv5 – Published: 2026-06-24 07:14 – Updated: 2026-08-05 12:31
VLAI
EPSS
VEX
Title
Bluetooth: serialize accept_q access
Summary
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: serialize accept_q access
bt_sock_poll() walks the accept queue without synchronization, while
child teardown can unlink the same socket and drop its last reference.
The unsynchronized accept queue walk has existed since the initial
Bluetooth import.
Protect accept_q with a dedicated lock for queue updates and polling.
Also rework bt_accept_dequeue() to take temporary child references under
the queue lock before dropping it and locking the child socket.
Severity
8.8 (High)
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/d9ce4de05df2385c1… | |
| https://git.kernel.org/stable/c/41c8c1c7923e86e0e… | |
| https://git.kernel.org/stable/c/4ec17782fd186f901… | |
| https://git.kernel.org/stable/c/be43e6b4043113c3b… | |
| https://git.kernel.org/stable/c/85f8674cae82053f1… | |
| https://git.kernel.org/stable/c/8b4c412e001b0c670… | |
| https://git.kernel.org/stable/c/a218bf69eb51fefe5… | |
| https://git.kernel.org/stable/c/e83f5e24da741fa94… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d9ce4de05df2385c19e2c7d12f529144e1a44af1
(git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 41c8c1c7923e86e0eb59cfb4279349112756a336 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4ec17782fd186f901a7329605d11048b085b945a (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < be43e6b4043113c3b3cf887c3c8350f67140274c (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 85f8674cae82053f1e6bab295f6a8422cca14db5 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8b4c412e001b0c670eb937beab491af974da55b3 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a218bf69eb51fefe59a3976fa8925261141f681c (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e83f5e24da741fa9405aeeff00b08c5ee7c37b88 (git) |
|
| Linux | Linux |
Affected:
2.6.12
Unaffected: 0 , < 2.6.12 (semver) Unaffected: 5.10.259 , ≤ 5.10.* (semver) Unaffected: 5.15.210 , ≤ 5.15.* (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.142 , ≤ 6.6.* (semver) Unaffected: 6.12.92 , ≤ 6.12.* (semver) Unaffected: 6.18.34 , ≤ 6.18.* (semver) Unaffected: 7.0.11 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
{
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"version": "6.6.142",
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},
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"version": "6.12.92",
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},
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CVE-2026-52947 (GCVE-0-2026-52947)
Vulnerability from cvelistv5 – Published: 2026-06-24 16:26 – Updated: 2026-08-05 12:31
VLAI
EPSS
VEX
Title
net: qrtr: fix refcount saturation and potential UAF in qrtr_port_remove
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: qrtr: fix refcount saturation and potential UAF in qrtr_port_remove
In qrtr_port_remove(), the socket reference count is decremented via
__sock_put() before the port is removed from the qrtr_ports XArray and
before the RCU grace period elapses.
This breaks the fundamental RCU update paradigm. It exposes a race
window where a concurrent RCU reader (such as qrtr_reset_ports() or
qrtr_port_lookup()) can obtain a pointer to the socket from the XArray,
and attempt to call sock_hold() on a socket whose reference count has
already dropped to zero.
This exact race condition was hit during syzkaller fuzzing, leading to
the following refcount saturation warning and a potential Use-After-Free:
refcount_t: saturated; leaking memory.
WARNING: CPU: 3 PID: 1273 at lib/refcount.c:22 refcount_warn_saturate+0xae/0x1d0
Modules linked in: qrtr(+) bochs drm_shmem_helper ...
Call Trace:
<TASK>
qrtr_reset_ports net/qrtr/af_qrtr.c:768 [inline] [qrtr]
__qrtr_bind.isra.0+0x48b/0x570 net/qrtr/af_qrtr.c:805 [qrtr]
qrtr_bind+0x17d/0x210 net/qrtr/af_qrtr.c:901 [qrtr]
kernel_bind+0xe4/0x120 net/socket.c:3592
qrtr_ns_init+0x1a6/0x380 net/qrtr/ns.c:715 [qrtr]
qrtr_proto_init+0x3b/0xff0 net/qrtr/af_qrtr.c:169 [qrtr]
do_one_initcall+0xf5/0x5e0 init/main.c:1283
...
</TASK>
Fix this by deferring the reference count decrement until after the
xa_erase() and the synchronize_rcu() complete.
(Note: The v1 of this patch incorrectly replaced __sock_put() with
sock_put(). As Simon Horman pointed out, the callers of qrtr_port_remove()
still hold a reference to the socket, so freeing the socket memory here
would lead to a subsequent UAF in the caller. Thus, the __sock_put() is
kept, but only repositioned to close the RCU race.)
Severity
7.8 (High)
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/2aa4c12723fe432e6… | |
| https://git.kernel.org/stable/c/03bfa95e452e2b6cc… | |
| https://git.kernel.org/stable/c/474293d90880622fd… | |
| https://git.kernel.org/stable/c/2047c2aa0963bb287… | |
| https://git.kernel.org/stable/c/7de2d447072be3b1a… | |
| https://git.kernel.org/stable/c/ab269990ed58143a9… | |
| https://git.kernel.org/stable/c/3b20ec8f31e8a6a67… | |
| https://git.kernel.org/stable/c/a2171131ecda1ed61… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
bdabad3e363d825ddf9679dd431cca0b2c30f881 , < 2aa4c12723fe432e623462a3be42a197a128722b
(git)
Affected: bdabad3e363d825ddf9679dd431cca0b2c30f881 , < 03bfa95e452e2b6ccd76a332060ae4feaf5ad84d (git) Affected: bdabad3e363d825ddf9679dd431cca0b2c30f881 , < 474293d90880622fde9d2430fb0165767090f7b3 (git) Affected: bdabad3e363d825ddf9679dd431cca0b2c30f881 , < 2047c2aa0963bb2872fd722300a15bcb441a4c00 (git) Affected: bdabad3e363d825ddf9679dd431cca0b2c30f881 , < 7de2d447072be3b1a76793f034432338fc9c494b (git) Affected: bdabad3e363d825ddf9679dd431cca0b2c30f881 , < ab269990ed58143a92a263be1bee626d82ac03da (git) Affected: bdabad3e363d825ddf9679dd431cca0b2c30f881 , < 3b20ec8f31e8a6a6782243f473b0abd3463621df (git) Affected: bdabad3e363d825ddf9679dd431cca0b2c30f881 , < a2171131ecda1ed61a594a1eb715e75fdad0fef5 (git) |
|
| Linux | Linux |
Affected:
4.7
Unaffected: 0 , < 4.7 (semver) Unaffected: 5.10.259 , ≤ 5.10.* (semver) Unaffected: 5.15.210 , ≤ 5.15.* (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.143 , ≤ 6.6.* (semver) Unaffected: 6.12.94 , ≤ 6.12.* (semver) Unaffected: 6.18.36 , ≤ 6.18.* (semver) Unaffected: 7.0.13 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qrtr: fix refcount saturation and potential UAF in qrtr_port_remove\n\nIn qrtr_port_remove(), the socket reference count is decremented via\n__sock_put() before the port is removed from the qrtr_ports XArray and\nbefore the RCU grace period elapses.\n\nThis breaks the fundamental RCU update paradigm. It exposes a race\nwindow where a concurrent RCU reader (such as qrtr_reset_ports() or\nqrtr_port_lookup()) can obtain a pointer to the socket from the XArray,\nand attempt to call sock_hold() on a socket whose reference count has\nalready dropped to zero.\n\nThis exact race condition was hit during syzkaller fuzzing, leading to\nthe following refcount saturation warning and a potential Use-After-Free:\n\n refcount_t: saturated; leaking memory.\n WARNING: CPU: 3 PID: 1273 at lib/refcount.c:22 refcount_warn_saturate+0xae/0x1d0\n Modules linked in: qrtr(+) bochs drm_shmem_helper ...\n Call Trace:\n \u003cTASK\u003e\n qrtr_reset_ports net/qrtr/af_qrtr.c:768 [inline] [qrtr]\n __qrtr_bind.isra.0+0x48b/0x570 net/qrtr/af_qrtr.c:805 [qrtr]\n qrtr_bind+0x17d/0x210 net/qrtr/af_qrtr.c:901 [qrtr]\n kernel_bind+0xe4/0x120 net/socket.c:3592\n qrtr_ns_init+0x1a6/0x380 net/qrtr/ns.c:715 [qrtr]\n qrtr_proto_init+0x3b/0xff0 net/qrtr/af_qrtr.c:169 [qrtr]\n do_one_initcall+0xf5/0x5e0 init/main.c:1283\n ...\n \u003c/TASK\u003e\n\nFix this by deferring the reference count decrement until after the\nxa_erase() and the synchronize_rcu() complete.\n\n(Note: The v1 of this patch incorrectly replaced __sock_put() with\nsock_put(). As Simon Horman pointed out, the callers of qrtr_port_remove()\nstill hold a reference to the socket, so freeing the socket memory here\nwould lead to a subsequent UAF in the caller. Thus, the __sock_put() is\nkept, but only repositioned to close the RCU race.)"
}
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CVE-2026-53072 (GCVE-0-2026-53072)
Vulnerability from cvelistv5 – Published: 2026-06-24 16:30 – Updated: 2026-08-05 12:33
VLAI
EPSS
VEX
Title
Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER
Summary
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER
When protocol sets HCI_PROTO_DEFER, hci_conn_request_evt() calls
hci_connect_cfm(conn) without hdev->lock. Generally hci_connect_cfm()
assumes it is held, and if conn is deleted concurrently -> UAF.
Only SCO and ISO set HCI_PROTO_DEFER and only for defer setup listen,
and HCI_EV_CONN_REQUEST is not generated for ISO. In the non-deferred
listening socket code paths, hci_connect_cfm(conn) is called with
hdev->lock held.
Fix by holding the lock.
Severity
8.8 (High)
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/60e3f4ff02d1f2d55… | |
| https://git.kernel.org/stable/c/9d4a6c0f43fc5e4d4… | |
| https://git.kernel.org/stable/c/c7777f534a8018ae4… | |
| https://git.kernel.org/stable/c/6b4d226d01ab7da0d… | |
| https://git.kernel.org/stable/c/541d5bf9b5afaf410… | |
| https://git.kernel.org/stable/c/385b2d0468a0871fc… | |
| https://git.kernel.org/stable/c/c27224daf0b08efbb… | |
| https://git.kernel.org/stable/c/5c7209a341ff2ac33… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
70c464256310e1c3716099b9d02ece4169272f73 , < 60e3f4ff02d1f2d55bfbf2ca32a97285a9771ee4
(git)
Affected: 70c464256310e1c3716099b9d02ece4169272f73 , < 9d4a6c0f43fc5e4d4f062e8e450e5483eb74176e (git) Affected: 70c464256310e1c3716099b9d02ece4169272f73 , < c7777f534a8018ae4bb1c80d8925af4df588a314 (git) Affected: 70c464256310e1c3716099b9d02ece4169272f73 , < 6b4d226d01ab7da0d2027a2a1e3a6079152e5065 (git) Affected: 70c464256310e1c3716099b9d02ece4169272f73 , < 541d5bf9b5afaf41090b2a3aa7b47f2db2ff801f (git) Affected: 70c464256310e1c3716099b9d02ece4169272f73 , < 385b2d0468a0871fc716c549fa3b0c257c7dbcb3 (git) Affected: 70c464256310e1c3716099b9d02ece4169272f73 , < c27224daf0b08efbb2b24ed64b6139b294f5473a (git) Affected: 70c464256310e1c3716099b9d02ece4169272f73 , < 5c7209a341ff2ac338b2b0375c34a307b37c9ac2 (git) |
|
| Linux | Linux |
Affected:
3.17
Unaffected: 0 , < 3.17 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.141 , ≤ 6.6.* (semver) Unaffected: 6.12.91 , ≤ 6.12.* (semver) Unaffected: 6.18.33 , ≤ 6.18.* (semver) Unaffected: 7.0.10 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
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CVE-2026-53091 (GCVE-0-2026-53091)
Vulnerability from cvelistv5 – Published: 2026-06-24 16:30 – Updated: 2026-09-10 12:04
VLAI
EPSS
VEX
Title
net: pull headers in qdisc_pkt_len_segs_init()
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: pull headers in qdisc_pkt_len_segs_init()
Most ndo_start_xmit() methods expects headers of gso packets
to be already in skb->head.
net/core/tso.c users are particularly at risk, because tso_build_hdr()
does a memcpy(hdr, skb->data, hdr_len);
qdisc_pkt_len_segs_init() already does a dissection of gso packets.
Use pskb_may_pull() instead of skb_header_pointer() to make
sure drivers do not have to reimplement this.
Some malicious packets could be fed, detect them so that we can
drop them sooner with a new SKB_DROP_REASON_SKB_BAD_GSO drop_reason.
Severity
CWE
- CWE-131 - Incorrect Calculation of Buffer Size
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/9d4f5c68f5ad4ab42… | |
| https://git.kernel.org/stable/c/7fb4c19670110f052… | |
| https://access.redhat.com/security/cve/CVE-2026-53091 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2492270 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:65334 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:66325 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:66324 | vendor-advisoryx_refsource_REDHAT |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
e876f208af18b074f800656e4d1b99da75b2135f , < 9d4f5c68f5ad4ab425f3ce1500c97c9f9743999a
(git)
Affected: e876f208af18b074f800656e4d1b99da75b2135f , < 7fb4c19670110f052c04e1ec1d2b953b9f4f57e4 (git) |
|
| Linux | Linux |
Affected:
3.16
Unaffected: 0 , < 3.16 (semver) Unaffected: 7.0.10 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:6.12.0-211.53.1.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:4.18.0-553.162.1.rt7.503.el8_10 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8::nfv |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:4.18.0-553.162.1.el8_10 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
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CVE-2026-53182 (GCVE-0-2026-53182)
Vulnerability from cvelistv5 – Published: 2026-06-25 08:38 – Updated: 2026-08-05 12:33
VLAI
EPSS
VEX
Title
wifi: nl80211: reject oversized EMA RNR lists
Summary
In the Linux kernel, the following vulnerability has been resolved:
wifi: nl80211: reject oversized EMA RNR lists
nl80211_parse_rnr_elems() stores the parsed element count in a
u8-backed cfg80211_rnr_elems::cnt field and uses that count to size
the flexible array allocation.
Reject nested NL80211_ATTR_EMA_RNR_ELEMS input once the count reaches
255, before incrementing it again. This keeps the parser aligned with
the data structure it fills and matches the existing bound check used
by nl80211_parse_mbssid_elems().
Severity
7.8 (High)
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/fc0ec2fc02dfe52c5… | |
| https://git.kernel.org/stable/c/688fcac7054abc680… | |
| https://git.kernel.org/stable/c/30c3fa80f423613ef… | |
| https://git.kernel.org/stable/c/265c07c09c8376217… | |
| https://git.kernel.org/stable/c/ecbf3c45add30a085… | |
| https://git.kernel.org/stable/c/4cd92957e8f8cc4eb… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
56189d7bc30531def6b999f27940ee43c6ff2569 , < fc0ec2fc02dfe52c5821f36fbccf6a45df43f508
(git)
Affected: dbbb27e183b1568d5a907ace1cd144b0709ea52a , < 688fcac7054abc680c0eef753f2bb772cfaf8cf7 (git) Affected: dbbb27e183b1568d5a907ace1cd144b0709ea52a , < 30c3fa80f423613efdda3deca4af52ff7d20e4e2 (git) Affected: dbbb27e183b1568d5a907ace1cd144b0709ea52a , < 265c07c09c837621730d35f02975207a1224bf05 (git) Affected: dbbb27e183b1568d5a907ace1cd144b0709ea52a , < ecbf3c45add30a0857414e156bdb9c79906f0ff6 (git) Affected: dbbb27e183b1568d5a907ace1cd144b0709ea52a , < 4cd92957e8f8cc4ebfe8a5d4203c14c592fde6b1 (git) Affected: 6.1.160 , < 6.1.176 (semver) |
|
| Linux | Linux |
Affected:
6.4
Unaffected: 0 , < 6.4 (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.143 , ≤ 6.6.* (semver) Unaffected: 6.12.94 , ≤ 6.12.* (semver) Unaffected: 6.18.36 , ≤ 6.18.* (semver) Unaffected: 7.0.13 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
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CVE-2026-53209 (GCVE-0-2026-53209)
Vulnerability from cvelistv5 – Published: 2026-06-25 08:39 – Updated: 2026-08-05 12:34
VLAI
EPSS
VEX
Title
Bluetooth: hci_sync: reject oversized Broadcast Announcement prepend
Summary
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: hci_sync: reject oversized Broadcast Announcement prepend
Existing advertising instances can already hold the maximum extended
advertising payload. When hci_adv_bcast_annoucement() prepends the
Broadcast Announcement service data to that payload, the combined data
may no longer fit in the temporary buffer used to rebuild the
advertising data.
Reject that case before copying the existing payload and report the
failure through the device log. This keeps the existing advertising
data intact and avoids overrunning the temporary buffer.
Severity
7.8 (High)
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/10b0e832cc05d7aef… | |
| https://git.kernel.org/stable/c/1338ee049a8910ba6… | |
| https://git.kernel.org/stable/c/02f50e8bb69f9b225… | |
| https://git.kernel.org/stable/c/dafc9f57140e66a10… | |
| https://git.kernel.org/stable/c/cdd8bbdbee763fdf5… | |
| https://git.kernel.org/stable/c/5c65b96b549ea2dcf… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
63f365eb4d1668a04070151b555d55a07ede8d4b , < 10b0e832cc05d7aef4b92bed912cbd4a395d0862
(git)
Affected: c621211b308816889f0a3246de448bfcef8ab3ab , < 1338ee049a8910ba6c9cee963920e978e6893c7d (git) Affected: 907ef6e12fb558a0763e894311eb245a94c192dd , < 02f50e8bb69f9b22516163a09922f5537d3b12d1 (git) Affected: 5725bc608252050ed8a4d47d59225b7dd73474c8 , < dafc9f57140e66a10945127aa7433c3d715dc253 (git) Affected: 5725bc608252050ed8a4d47d59225b7dd73474c8 , < cdd8bbdbee763fdf5bf343e6f7d4e79347739f62 (git) Affected: 5725bc608252050ed8a4d47d59225b7dd73474c8 , < 5c65b96b549ea2dcfde497436bf9e048deb87758 (git) Affected: 15da883c010cbc2a84aec1738b6ad6ee477846de (git) Affected: 6.1.142 , < 6.1.176 (semver) Affected: 6.6.94 , < 6.6.143 (semver) Affected: 6.12.34 , < 6.12.94 (semver) Affected: 6.15.3 , < 6.16 (semver) |
|
| Linux | Linux |
Affected:
6.16
Unaffected: 0 , < 6.16 (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.143 , ≤ 6.6.* (semver) Unaffected: 6.12.94 , ≤ 6.12.* (semver) Unaffected: 6.18.36 , ≤ 6.18.* (semver) Unaffected: 7.0.13 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
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{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: reject oversized Broadcast Announcement prepend\n\nExisting advertising instances can already hold the maximum extended\nadvertising payload. When hci_adv_bcast_annoucement() prepends the\nBroadcast Announcement service data to that payload, the combined data\nmay no longer fit in the temporary buffer used to rebuild the\nadvertising data.\n\nReject that case before copying the existing payload and report the\nfailure through the device log. This keeps the existing advertising\ndata intact and avoids overrunning the temporary buffer."
}
],
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{
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"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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{
"lang": "en",
"value": "AV:L - The vulnerable path is reached through local AF_BLUETOOTH HCI management/ISO socket operations that configure advertising data and start BIS/periodic advertising. It is not reachable directly from Bluetooth radio packets sent by an adjacent attacker.\nAC:L - The attacker can choose the advertising payload length/content, omit an existing Broadcast Announcement, provide BASE data that creates Basic Audio Announcement periodic data, and trigger the prepend deterministically. The needed Bluetooth LE Audio/extended advertising support is a reasonable affected deployment condition.\nPR:L - The advertising setup path requires a trusted HCI management socket via CAP_NET_ADMIN, but the code uses capable() and is therefore reachable by a basic local user with CAP_NET_ADMIN obtained in a user namespace on systems allowing unprivileged user namespaces. ISO socket triggering itself has no stronger privilege gate.\nUI:N - No victim action is required once the local attacker can issue the Bluetooth socket operations. The attacker performs both setup and trigger steps directly.\nS:U - The corruption occurs in kernel Bluetooth code and affects the same kernel security authority. This is a standard local kernel memory-corruption scenario, not a VM/IOMMU or other cross-scope boundary escape.\nC:H - The bug is an attacker-controlled kernel stack out-of-bounds write, and such memory corruption can plausibly be leveraged beyond a simple crash in less hardened configurations. Under the required uncertainty rule, confidentiality impact is scored high.\nI:H - The vulnerable memcpy writes past a fixed 251-byte stack buffer with attacker-controlled advertising bytes. Out-of-bounds kernel writes are scored as high integrity impact because they may enable control-flow or data corruption.\nA:H - At minimum, the overflow can corrupt stack state or trigger hardening checks such as stack protector/FORTIFY, causing an oops or panic. The attacker can repeat the local trigger to deny service."
}
]
}
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"references": [
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"url": "https://git.kernel.org/stable/c/10b0e832cc05d7aef4b92bed912cbd4a395d0862"
},
{
"url": "https://git.kernel.org/stable/c/1338ee049a8910ba6c9cee963920e978e6893c7d"
},
{
"url": "https://git.kernel.org/stable/c/02f50e8bb69f9b22516163a09922f5537d3b12d1"
},
{
"url": "https://git.kernel.org/stable/c/dafc9f57140e66a10945127aa7433c3d715dc253"
},
{
"url": "https://git.kernel.org/stable/c/cdd8bbdbee763fdf5bf343e6f7d4e79347739f62"
},
{
"url": "https://git.kernel.org/stable/c/5c65b96b549ea2dcfde497436bf9e048deb87758"
}
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"title": "Bluetooth: hci_sync: reject oversized Broadcast Announcement prepend",
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"cveId": "CVE-2026-53209",
"datePublished": "2026-06-25T08:39:14.915Z",
"dateReserved": "2026-06-09T07:44:35.391Z",
"dateUpdated": "2026-08-05T12:34:09.314Z",
"state": "PUBLISHED"
},
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CVE-2026-53254 (GCVE-0-2026-53254)
Vulnerability from cvelistv5 – Published: 2026-06-25 08:39 – Updated: 2026-08-05 12:34
VLAI
EPSS
VEX
Title
Bluetooth: RFCOMM: validate skb length in MCC handlers
Summary
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: RFCOMM: validate skb length in MCC handlers
The RFCOMM MCC handlers cast skb->data to protocol-specific structs
without validating skb->len first. A malicious remote device can send
truncated MCC frames and trigger out-of-bounds reads in these handlers.
Fix this by using skb_pull_data() to validate and access the required
data before dereferencing it.
rfcomm_recv_rpn() requires special handling since ETSI TS 07.10 allows
1-byte RPN requests. Handle this by validating only the DLCI byte first,
and validating the full struct only when len > 1.
Severity
8.1 (High)
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/7c15c7c2878957cbf… | |
| https://git.kernel.org/stable/c/0d637136ce89f9a23… | |
| https://git.kernel.org/stable/c/98377e6b1a1a56561… | |
| https://git.kernel.org/stable/c/1b070ac9e99c2c2c3… | |
| https://git.kernel.org/stable/c/3eabc6d47a0ad22b0… | |
| https://git.kernel.org/stable/c/08b9c1fbe78f4ad3f… | |
| https://git.kernel.org/stable/c/23882b828c3c8c51d… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7c15c7c2878957cbfed93bcc29c13fdace464254
(git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 0d637136ce89f9a2309b2c3502402ce400dab0ef (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 98377e6b1a1a56561ec66a181573ea2b61b2079e (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1b070ac9e99c2c2c3a8112943ca98ab6fca7f10c (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 3eabc6d47a0ad22b053329997aaf0ec1e581e392 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 08b9c1fbe78f4ad3f6250c6541cfaabdbeb81997 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 23882b828c3c8c51d0c946446a396b10abb3b16b (git) |
|
| Linux | Linux |
Affected:
2.6.12
Unaffected: 0 , < 2.6.12 (semver) Unaffected: 5.15.210 , ≤ 5.15.* (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.143 , ≤ 6.6.* (semver) Unaffected: 6.12.94 , ≤ 6.12.* (semver) Unaffected: 6.18.36 , ≤ 6.18.* (semver) Unaffected: 7.0.13 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: RFCOMM: validate skb length in MCC handlers\n\nThe RFCOMM MCC handlers cast skb-\u003edata to protocol-specific structs\nwithout validating skb-\u003elen first. A malicious remote device can send\ntruncated MCC frames and trigger out-of-bounds reads in these handlers.\n\nFix this by using skb_pull_data() to validate and access the required\ndata before dereferencing it.\n\nrfcomm_recv_rpn() requires special handling since ETSI TS 07.10 allows\n1-byte RPN requests. Handle this by validating only the DLCI byte first,\nand validating the full struct only when len \u003e 1."
}
],
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"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
"version": "3.1"
},
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{
"lang": "en",
"value": "AV:A - An attacker reaches the vulnerable RFCOMM MCC parsing code by sending malformed Bluetooth RFCOMM frames over a BR/EDR L2CAP connection. Bluetooth requires radio adjacency rather than ordinary IP network reachability.\nAC:L - The attacker controls the RFCOMM frame contents and can send truncated MCC frames directly after establishing the Bluetooth/L2CAP connection. No race or condition outside the attacker\u2019s control is required.\nPR:N - The RFCOMM L2CAP listener uses the SDP/low-security path, and the vulnerable control-channel parsing occurs before RFCOMM DLC/service-level authentication. A malicious nearby Bluetooth device does not need local privileges or authenticated credentials.\nUI:N - No victim action is needed once the target Bluetooth stack is reachable and accepting RFCOMM/L2CAP traffic. The attacker sends the malformed frames directly.\nS:U - The impact is within the Linux kernel Bluetooth/RFCOMM security authority. There is no VM escape, IOMMU bypass, or separate security scope crossed.\nC:H - The bug is an out-of-bounds read from kernel skb memory, and some handler paths can reflect values derived from parsed control fields back to the peer. Under the required higher-severity rule, this is scored as high confidentiality impact.\nI:N - The fix and code review show bounded out-of-bounds reads, not an out-of-bounds write, use-after-free, or control-flow corruption primitive. Any state changes are limited to RFCOMM negotiation for the attacker-controlled connection.\nA:H - Malformed short Bluetooth frames can trigger kernel out-of-bounds reads in the RFCOMM receive thread, with related Bluetooth short-frame bugs producing KASAN slab-out-of-bounds reports. Under kernel scoring guidance, such remotely triggerable kernel fault conditions are high availability impact."
}
]
}
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"cveId": "CVE-2026-53254",
"datePublished": "2026-06-25T08:39:45.273Z",
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Loading…
Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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