RHSA-2026:3358
Vulnerability from csaf_redhat - Published: 2026-02-25 14:18 - Updated: 2026-03-18 03:17Summary
Red Hat Security Advisory: kernel-rt security update
Notes
Topic
An update for kernel-rt is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions.
Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.
Security Fix(es):
* kernel: Linux kernel: xHCI driver isochronous event handling race condition leading to data loss or UAF (CVE-2025-37882)
* kernel: scsi: mpi3mr: Synchronous access b/w reset and tm thread for reply queue (CVE-2025-37861)
* kernel: Linux kernel: Memory corruption in Squashfs due to incorrect block size calculation (CVE-2025-38415)
* kernel: Linux kernel: Denial of Service via out-of-bounds read in USB configuration parsing (CVE-2025-39760)
* kernel: Linux kernel: Out-of-bounds write in VXLAN due to incorrect nexthop hash size leading to denial of service (CVE-2023-53192)
* kernel: smb: client: let recv_done verify data_offset, data_length and remaining_data_length (CVE-2025-39933)
* kernel: Linux kernel: Use-after-free in proc_readdir_de() can lead to privilege escalation or denial of service. (CVE-2025-40271)
* kernel: Linux kernel Bluetooth: Denial of Service due to use-after-free in connection handling (CVE-2023-53762)
* kernel: Linux kernel ALSA USB audio driver: Buffer overflow leading to information disclosure and denial of service (CVE-2025-40269)
* kernel: ip6_vti: fix slab-use-after-free in decode_session6 (CVE-2023-53821)
* kernel: ext4: fix use-after-free in ext4_orphan_cleanup (CVE-2022-50673)
* kernel: NFSv4/pNFS: Clear NFS_INO_LAYOUTCOMMIT in pnfs_mark_layout_stateid_invalid (CVE-2025-68349)
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.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
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"category": "description",
"text": "A use-after-free vulnerability was found in the ext4 filesystem\u0027s orphan inode cleanup routine in the Linux kernel. When ext4_inode_attach_jinode() fails with -ENOMEM during orphan cleanup at mount time, the error is not properly propagated. The inode is freed via iput(), but the orphan list still references the same inode number. On the next loop iteration, the freed inode structure is reused, triggering a use-after-free when adding it to the orphan list.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: ext4: fix use-after-free in ext4_orphan_cleanup",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This flaw occurs during ext4 filesystem mount when memory allocation fails at a specific point in orphan inode processing. Exploitation requires local access to mount ext4 filesystems and the ability to induce memory pressure during the mount operation, making practical exploitation difficult.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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"category": "self",
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},
{
"category": "external",
"summary": "RHBZ#2420347",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2420347"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2022-50673",
"url": "https://www.cve.org/CVERecord?id=CVE-2022-50673"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2022-50673",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50673"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025120947-CVE-2022-50673-f920@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025120947-CVE-2022-50673-f920@gregkh/T"
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{
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"text": "A flaw was found in the Linux kernel\u0027s Virtual Extensible LAN (VXLAN) implementation. An attacker with elevated privileges (CAP_NET_ADMIN) can exploit this vulnerability by configuring the system to accept and forward VXLAN packets. The issue arises from an incorrect nexthop hash size, where a 32-bit hash is used instead of the expected 31-bit hash, leading to negative hash values. This can cause an out-of-bounds write in the nexthop group selection, resulting in a kernel panic and a denial of service (DoS).",
"title": "Vulnerability description"
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{
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"text": "kernel: Linux kernel: Out-of-bounds write in VXLAN due to incorrect nexthop hash size leading to denial of service",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This vulnerability requires elevated privileges (`CAP_NET_ADMIN`) to exploit, since it can only be triggered if the system is configured to accept and forward VXLAN packets.",
"title": "Statement"
},
{
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"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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{
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"text": "A use-after-free vulnerability was found in the IPv6 VTI (Virtual Tunnel Interface) implementation in the Linux kernel. When an IPv6 VTI device uses the SFB (Stochastic Fair Blue) qdisc, the control block (cb) field of an skb can be modified during packet enqueuing. The decode_session6() function then reads from this modified cb field, accessing freed memory (IP6CB(skb)-\u003enhoff was not set for transmit path). This can lead to kernel crashes or potentially arbitrary code execution.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: ip6_vti: fix slab-use-after-free in decode_session6",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is a use-after-free vulnerability in IPv6 VTI tunnel handling that can be triggered when specific qdisc configurations are used. The vulnerability requires local access and specific network configuration involving VTI tunnels with SFB qdisc.",
"title": "Statement"
},
{
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"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: mpi3mr: Synchronous access b/w reset and tm thread for reply queue\n\nWhen the task management thread processes reply queues while the reset\nthread resets them, the task management thread accesses an invalid queue ID\n(0xFFFF), set by the reset thread, which points to unallocated memory,\ncausing a crash.\n\nAdd flag \u0027io_admin_reset_sync\u0027 to synchronize access between the reset,\nI/O, and admin threads. Before a reset, the reset handler sets this flag to\nblock I/O and admin processing threads. If any thread bypasses the initial\ncheck, the reset thread waits up to 10 seconds for processing to finish. If\nthe wait exceeds 10 seconds, the controller is marked as unrecoverable.",
"title": "Vulnerability description"
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"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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{
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{
"category": "description",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: let recv_done verify data_offset, data_length and remaining_data_length\n\nThis is inspired by the related server fixes.",
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{
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"text": "kernel: smb: client: let recv_done verify data_offset, data_length and remaining_data_length",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "SMB Direct client failed to validate data_offset, data_length, and remaining_data_length in SMBD \u201cdata transfer\u201d messages. A malicious server can craft values that cause out-of-bounds access in the kernel receive path, leading to memory corruption and potential code execution.\nA malicious SMB Direct server can trigger a kernel crash on a connected and authenticated Linux client by sending malformed data transfer packets over an active RDMA session.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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},
{
"category": "external",
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{
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},
{
"category": "external",
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},
{
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"url": "https://lore.kernel.org/linux-cve-announce/2025100417-CVE-2025-39933-e224@gregkh/T"
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{
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},
{
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"url": "https://www.cve.org/CVERecord?id=CVE-2025-68349"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-68349",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68349"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025122453-CVE-2025-68349-12d5@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025122453-CVE-2025-68349-12d5@gregkh/T"
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"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
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"title": "kernel: NFSv4/pNFS: Clear NFS_INO_LAYOUTCOMMIT in pnfs_mark_layout_stateid_invalid"
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}
Loading…
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Sightings
| Author | Source | Type | Date |
|---|
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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