CVE-2026-52910 (GCVE-0-2026-52910)
Vulnerability from cvelistv5 – Published: 2026-06-19 14:43 – Updated: 2026-09-08 08:49
VLAI
EPSS
VEX
Title
bpf: Free reuseport cBPF prog after RCU grace period.
Summary
In the Linux kernel, the following vulnerability has been resolved:
bpf: Free reuseport cBPF prog after RCU grace period.
Eulgyu Kim reported the splat below with a repro. [0]
The repro sets up a UDP reuseport group with a cBPF prog and
replaces it with a new one while another thread is sending
a UDP packet to the group.
The reuseport prog is freed by sk_reuseport_prog_free().
bpf_prog_put() is called for "e"BPF prog to destruct through
multiple stages while cBPF prog is freed immediately by
bpf_release_orig_filter() and bpf_prog_free().
If a reuseport prog is detached from the setsockopt() path
(reuseport_attach_prog() or reuseport_detach_prog()),
sk_reuseport_prog_free() is called without waiting for RCU
readers to complete, resulting in various bugs.
Let's defer freeing the reuseport cBPF prog after one RCU
grace period.
Note "e"BPF prog is safe as is unless the fast path starts
to touch fields destroyed in bpf_prog_put_deferred() and
__bpf_prog_put_noref().
[0]:
BUG: KASAN: vmalloc-out-of-bounds in reuseport_select_sock+0xedc/0x1220 net/core/sock_reuseport.c:596
Read of size 4 at addr ffffc9000051e004 by task slowme/10208
CPU: 6 UID: 1000 PID: 10208 Comm: slowme Not tainted 7.0.0-geb7ac95ff75e #32 PREEMPT(full)
Hardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
<IRQ>
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xca/0x240 mm/kasan/report.c:482
kasan_report+0x118/0x150 mm/kasan/report.c:595
reuseport_select_sock+0xedc/0x1220 net/core/sock_reuseport.c:596
udp4_lib_lookup2+0x3bc/0x950 net/ipv4/udp.c:495
__udp4_lib_lookup+0x768/0xe20 net/ipv4/udp.c:723
__udp4_lib_lookup_skb+0x297/0x390 net/ipv4/udp.c:752
__udp4_lib_rcv+0x1312/0x2620 net/ipv4/udp.c:2752
ip_protocol_deliver_rcu+0x282/0x440 net/ipv4/ip_input.c:207
ip_local_deliver_finish+0x3bb/0x6f0 net/ipv4/ip_input.c:241
NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:318
NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:318
__netif_receive_skb_one_core net/core/dev.c:6181 [inline]
__netif_receive_skb net/core/dev.c:6294 [inline]
process_backlog+0xaa4/0x1960 net/core/dev.c:6645
__napi_poll+0xae/0x340 net/core/dev.c:7709
napi_poll net/core/dev.c:7772 [inline]
net_rx_action+0x5d7/0xf50 net/core/dev.c:7929
handle_softirqs+0x22b/0x870 kernel/softirq.c:622
do_softirq+0x76/0xd0 kernel/softirq.c:523
</IRQ>
<TASK>
__local_bh_enable_ip+0xf8/0x130 kernel/softirq.c:450
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:924 [inline]
__dev_queue_xmit+0x1dd7/0x3710 net/core/dev.c:4890
neigh_output include/net/neighbour.h:556 [inline]
ip_finish_output2+0xca9/0x1070 net/ipv4/ip_output.c:237
NF_HOOK_COND include/linux/netfilter.h:307 [inline]
ip_output+0x29f/0x450 net/ipv4/ip_output.c:438
ip_send_skb+0x45/0xc0 net/ipv4/ip_output.c:1508
udp_send_skb+0xb04/0x1510 net/ipv4/udp.c:1195
udp_sendmsg+0x1a71/0x2350 net/ipv4/udp.c:1485
sock_sendmsg_nosec net/socket.c:727 [inline]
__sock_sendmsg net/socket.c:742 [inline]
__sys_sendto+0x554/0x680 net/socket.c:2206
__do_sys_sendto net/socket.c:2213 [inline]
__se_sys_sendto net/socket.c:2209 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2209
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x160/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x415a2d
Code: b3 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6bc31e41e8 EFLAGS: 00000212 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f6bc31e4cdc RCX: 0000000000415a2d
RDX: 0000000000000001 RSI: 00007f6bc31e421f RDI: 0000000000000003
RBP: 00007f6bc31e4240 R08: 00007f6bc31e4220 R09: 0000000000000010
R10: 0000000000000000 R11:
---truncated---
Severity
7.8 (High)
6.4 (Medium)
CWE
- CWE-364 - Signal Handler Race Condition
Assigner
References
12 references
Impacted products
10 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
538950a1b7527a0a52ccd9337e3fcd304f027f13 , < 08264d5bba0bdd3a79bc2984fee09286aba0c4eb
(git)
Affected: 538950a1b7527a0a52ccd9337e3fcd304f027f13 , < fec41484e7c2aa7ded44c541bba98872be937754 (git) Affected: 538950a1b7527a0a52ccd9337e3fcd304f027f13 , < c3e3fddda6b5d9ba505d218b4055e7d8a282ac57 (git) Affected: 538950a1b7527a0a52ccd9337e3fcd304f027f13 , < f8b8f1d4bb76098e87b8269a0631019648330e6d (git) Affected: 538950a1b7527a0a52ccd9337e3fcd304f027f13 , < 298db6167f81e9c470a57cf652e4e47757b4293e (git) Affected: 538950a1b7527a0a52ccd9337e3fcd304f027f13 , < 87dfb977bdb6eaa47e9993a34e18f44970f88b1f (git) Affected: 538950a1b7527a0a52ccd9337e3fcd304f027f13 , < 90e47dc5c572d1c73971ac51c7428803f42b78eb (git) Affected: 538950a1b7527a0a52ccd9337e3fcd304f027f13 , < 18fc650ccd7fe3376eca89203668cfb8268f60df (git) |
guessed | |
| Linux | Linux |
Affected:
4.5
Unaffected: 0 , < 4.5 (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) |
guessed | |
| 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
|
||
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
guessed | |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
guessed |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Free reuseport cBPF prog after RCU grace period.\n\nEulgyu Kim reported the splat below with a repro. [0]\n\nThe repro sets up a UDP reuseport group with a cBPF prog and\nreplaces it with a new one while another thread is sending\na UDP packet to the group.\n\nThe reuseport prog is freed by sk_reuseport_prog_free().\nbpf_prog_put() is called for \"e\"BPF prog to destruct through\nmultiple stages while cBPF prog is freed immediately by\nbpf_release_orig_filter() and bpf_prog_free().\n\nIf a reuseport prog is detached from the setsockopt() path\n(reuseport_attach_prog() or reuseport_detach_prog()),\nsk_reuseport_prog_free() is called without waiting for RCU\nreaders to complete, resulting in various bugs.\n\nLet\u0027s defer freeing the reuseport cBPF prog after one RCU\ngrace period.\n\nNote \"e\"BPF prog is safe as is unless the fast path starts\nto touch fields destroyed in bpf_prog_put_deferred() and\n__bpf_prog_put_noref().\n\n[0]:\nBUG: KASAN: vmalloc-out-of-bounds in reuseport_select_sock+0xedc/0x1220 net/core/sock_reuseport.c:596\nRead of size 4 at addr ffffc9000051e004 by task slowme/10208\nCPU: 6 UID: 1000 PID: 10208 Comm: slowme Not tainted 7.0.0-geb7ac95ff75e #32 PREEMPT(full)\nHardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\nCall Trace:\n \u003cIRQ\u003e\n dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120\n print_address_description mm/kasan/report.c:378 [inline]\n print_report+0xca/0x240 mm/kasan/report.c:482\n kasan_report+0x118/0x150 mm/kasan/report.c:595\n reuseport_select_sock+0xedc/0x1220 net/core/sock_reuseport.c:596\n udp4_lib_lookup2+0x3bc/0x950 net/ipv4/udp.c:495\n __udp4_lib_lookup+0x768/0xe20 net/ipv4/udp.c:723\n __udp4_lib_lookup_skb+0x297/0x390 net/ipv4/udp.c:752\n __udp4_lib_rcv+0x1312/0x2620 net/ipv4/udp.c:2752\n ip_protocol_deliver_rcu+0x282/0x440 net/ipv4/ip_input.c:207\n ip_local_deliver_finish+0x3bb/0x6f0 net/ipv4/ip_input.c:241\n NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:318\n NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:318\n __netif_receive_skb_one_core net/core/dev.c:6181 [inline]\n __netif_receive_skb net/core/dev.c:6294 [inline]\n process_backlog+0xaa4/0x1960 net/core/dev.c:6645\n __napi_poll+0xae/0x340 net/core/dev.c:7709\n napi_poll net/core/dev.c:7772 [inline]\n net_rx_action+0x5d7/0xf50 net/core/dev.c:7929\n handle_softirqs+0x22b/0x870 kernel/softirq.c:622\n do_softirq+0x76/0xd0 kernel/softirq.c:523\n \u003c/IRQ\u003e\n \u003cTASK\u003e\n __local_bh_enable_ip+0xf8/0x130 kernel/softirq.c:450\n local_bh_enable include/linux/bottom_half.h:33 [inline]\n rcu_read_unlock_bh include/linux/rcupdate.h:924 [inline]\n __dev_queue_xmit+0x1dd7/0x3710 net/core/dev.c:4890\n neigh_output include/net/neighbour.h:556 [inline]\n ip_finish_output2+0xca9/0x1070 net/ipv4/ip_output.c:237\n NF_HOOK_COND include/linux/netfilter.h:307 [inline]\n ip_output+0x29f/0x450 net/ipv4/ip_output.c:438\n ip_send_skb+0x45/0xc0 net/ipv4/ip_output.c:1508\n udp_send_skb+0xb04/0x1510 net/ipv4/udp.c:1195\n udp_sendmsg+0x1a71/0x2350 net/ipv4/udp.c:1485\n sock_sendmsg_nosec net/socket.c:727 [inline]\n __sock_sendmsg net/socket.c:742 [inline]\n __sys_sendto+0x554/0x680 net/socket.c:2206\n __do_sys_sendto net/socket.c:2213 [inline]\n __se_sys_sendto net/socket.c:2209 [inline]\n __x64_sys_sendto+0xde/0x100 net/socket.c:2209\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0x160/0xf80 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x415a2d\nCode: b3 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007f6bc31e41e8 EFLAGS: 00000212 ORIG_RAX: 000000000000002c\nRAX: ffffffffffffffda RBX: 00007f6bc31e4cdc RCX: 0000000000415a2d\nRDX: 0000000000000001 RSI: 00007f6bc31e421f RDI: 0000000000000003\nRBP: 00007f6bc31e4240 R08: 00007f6bc31e4220 R09: 0000000000000010\nR10: 0000000000000000 R11: \n---truncated---"
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"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"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The vulnerable attach/detach operation is reached through local `setsockopt()` on an `SO_REUSEPORT` socket with `SO_ATTACH_REUSEPORT_CBPF` or `SO_DETACH_REUSEPORT_BPF`. Although packet receive executes the stale program, the attacker-controlled trigger for freeing/replacing it is a local socket API path.\nAC:L - The race is attacker-controlled: a local attacker can create the UDP reuseport group, replace/detach the cBPF program, and concurrently send packets to drive `reuseport_select_sock()`. No rare external condition is required.\nPR:L - A basic unprivileged local user can create UDP sockets on an unprivileged port, set `SO_REUSEPORT`, and attach a classic reuseport BPF filter; this path does not require `CAP_NET_ADMIN`. User namespaces are not needed to make the path reachable.\nUI:N - No victim user action is required once the attacker runs the local reproducer. The attacker controls the sockets, the filter replacement, and the packet generation.\nS:U - The bug is a kernel memory lifetime error used for local kernel compromise or crash within the same host security authority. It does not cross a VM, IOMMU, or similar security boundary.\nC:H - This is a use-after-free of a `bpf_prog` object that is dereferenced after reclamation while selecting a reuseport socket. Per kernel CVSS guidance, UAFs are treated as enabling high confidentiality impact through potential kernel memory disclosure.\nI:H - The stale freed `bpf_prog` can be reused while the receive path reads and runs through the program object, making control-flow or data corruption plausible. Per kernel CVSS guidance, UAF memory corruption warrants high integrity impact.\nA:H - The reported reproducer triggers a KASAN vmalloc out-of-bounds/use-after-free splat in the packet receive path. Such kernel memory corruption can reliably crash or destabilize the kernel."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T12:31:33.683Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/08264d5bba0bdd3a79bc2984fee09286aba0c4eb"
},
{
"url": "https://git.kernel.org/stable/c/fec41484e7c2aa7ded44c541bba98872be937754"
},
{
"url": "https://git.kernel.org/stable/c/c3e3fddda6b5d9ba505d218b4055e7d8a282ac57"
},
{
"url": "https://git.kernel.org/stable/c/f8b8f1d4bb76098e87b8269a0631019648330e6d"
},
{
"url": "https://git.kernel.org/stable/c/298db6167f81e9c470a57cf652e4e47757b4293e"
},
{
"url": "https://git.kernel.org/stable/c/87dfb977bdb6eaa47e9993a34e18f44970f88b1f"
},
{
"url": "https://git.kernel.org/stable/c/90e47dc5c572d1c73971ac51c7428803f42b78eb"
},
{
"url": "https://git.kernel.org/stable/c/18fc650ccd7fe3376eca89203668cfb8268f60df"
}
],
"title": "bpf: Free reuseport cBPF prog after RCU grace period.",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-52910",
"datePublished": "2026-06-19T14:43:33.952Z",
"dateReserved": "2026-06-09T07:44:35.366Z",
"dateUpdated": "2026-09-08T08:49:38.284Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-52910",
"date": "2026-09-14",
"epss": "0.00104",
"percentile": "0.01127"
},
"microsoft_vex": {
"current_release_date": "2026-07-09T14:49:23.000Z",
"cve": "CVE-2026-52910",
"id": "msrc_CVE-2026-52910",
"initial_release_date": "2026-06-02T00:00:00.000Z",
"product_status:fixed": "1",
"product_status:known_affected": "1",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "bpf: Free reuseport cBPF prog after RCU grace period.",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-52910.json",
"version": "3"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-52910\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-06-19T15:16:35.487\",\"lastModified\":\"2026-09-08T09:18:10.877\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbpf: Free reuseport cBPF prog after RCU grace period.\\n\\nEulgyu Kim reported the splat below with a repro. [0]\\n\\nThe repro sets up a UDP reuseport group with a cBPF prog and\\nreplaces it with a new one while another thread is sending\\na UDP packet to the group.\\n\\nThe reuseport prog is freed by sk_reuseport_prog_free().\\nbpf_prog_put() is called for \\\"e\\\"BPF prog to destruct through\\nmultiple stages while cBPF prog is freed immediately by\\nbpf_release_orig_filter() and bpf_prog_free().\\n\\nIf a reuseport prog is detached from the setsockopt() path\\n(reuseport_attach_prog() or reuseport_detach_prog()),\\nsk_reuseport_prog_free() is called without waiting for RCU\\nreaders to complete, resulting in various bugs.\\n\\nLet\u0027s defer freeing the reuseport cBPF prog after one RCU\\ngrace period.\\n\\nNote \\\"e\\\"BPF prog is safe as is unless the fast path starts\\nto touch fields destroyed in bpf_prog_put_deferred() and\\n__bpf_prog_put_noref().\\n\\n[0]:\\nBUG: KASAN: vmalloc-out-of-bounds in reuseport_select_sock+0xedc/0x1220 net/core/sock_reuseport.c:596\\nRead of size 4 at addr ffffc9000051e004 by task slowme/10208\\nCPU: 6 UID: 1000 PID: 10208 Comm: slowme Not tainted 7.0.0-geb7ac95ff75e #32 PREEMPT(full)\\nHardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\\nCall Trace:\\n \u003cIRQ\u003e\\n dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120\\n print_address_description mm/kasan/report.c:378 [inline]\\n print_report+0xca/0x240 mm/kasan/report.c:482\\n kasan_report+0x118/0x150 mm/kasan/report.c:595\\n reuseport_select_sock+0xedc/0x1220 net/core/sock_reuseport.c:596\\n udp4_lib_lookup2+0x3bc/0x950 net/ipv4/udp.c:495\\n __udp4_lib_lookup+0x768/0xe20 net/ipv4/udp.c:723\\n __udp4_lib_lookup_skb+0x297/0x390 net/ipv4/udp.c:752\\n __udp4_lib_rcv+0x1312/0x2620 net/ipv4/udp.c:2752\\n ip_protocol_deliver_rcu+0x282/0x440 net/ipv4/ip_input.c:207\\n ip_local_deliver_finish+0x3bb/0x6f0 net/ipv4/ip_input.c:241\\n NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:318\\n NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:318\\n __netif_receive_skb_one_core net/core/dev.c:6181 [inline]\\n __netif_receive_skb net/core/dev.c:6294 [inline]\\n process_backlog+0xaa4/0x1960 net/core/dev.c:6645\\n __napi_poll+0xae/0x340 net/core/dev.c:7709\\n napi_poll net/core/dev.c:7772 [inline]\\n net_rx_action+0x5d7/0xf50 net/core/dev.c:7929\\n handle_softirqs+0x22b/0x870 kernel/softirq.c:622\\n do_softirq+0x76/0xd0 kernel/softirq.c:523\\n \u003c/IRQ\u003e\\n \u003cTASK\u003e\\n __local_bh_enable_ip+0xf8/0x130 kernel/softirq.c:450\\n local_bh_enable include/linux/bottom_half.h:33 [inline]\\n rcu_read_unlock_bh include/linux/rcupdate.h:924 [inline]\\n __dev_queue_xmit+0x1dd7/0x3710 net/core/dev.c:4890\\n neigh_output include/net/neighbour.h:556 [inline]\\n ip_finish_output2+0xca9/0x1070 net/ipv4/ip_output.c:237\\n NF_HOOK_COND include/linux/netfilter.h:307 [inline]\\n ip_output+0x29f/0x450 net/ipv4/ip_output.c:438\\n ip_send_skb+0x45/0xc0 net/ipv4/ip_output.c:1508\\n udp_send_skb+0xb04/0x1510 net/ipv4/udp.c:1195\\n udp_sendmsg+0x1a71/0x2350 net/ipv4/udp.c:1485\\n sock_sendmsg_nosec net/socket.c:727 [inline]\\n __sock_sendmsg net/socket.c:742 [inline]\\n __sys_sendto+0x554/0x680 net/socket.c:2206\\n __do_sys_sendto net/socket.c:2213 [inline]\\n __se_sys_sendto net/socket.c:2209 [inline]\\n __x64_sys_sendto+0xde/0x100 net/socket.c:2209\\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\\n do_syscall_64+0x160/0xf80 arch/x86/entry/syscall_64.c:94\\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\\nRIP: 0033:0x415a2d\\nCode: b3 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48\\nRSP: 002b:00007f6bc31e41e8 EFLAGS: 00000212 ORIG_RAX: 000000000000002c\\nRAX: ffffffffffffffda RBX: 00007f6bc31e4cdc RCX: 0000000000415a2d\\nRDX: 0000000000000001 RSI: 00007f6bc31e421f RDI: 0000000000000003\\nRBP: 00007f6bc31e4240 R08: 00007f6bc31e4220 R09: 0000000000000010\\nR10: 0000000000000000 R11: \\n---truncated---\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/core/filter.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"538950a1b7527a0a52ccd9337e3fcd304f027f13\",\"lessThan\":\"08264d5bba0bdd3a79bc2984fee09286aba0c4eb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"538950a1b7527a0a52ccd9337e3fcd304f027f13\",\"lessThan\":\"fec41484e7c2aa7ded44c541bba98872be937754\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"538950a1b7527a0a52ccd9337e3fcd304f027f13\",\"lessThan\":\"c3e3fddda6b5d9ba505d218b4055e7d8a282ac57\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"538950a1b7527a0a52ccd9337e3fcd304f027f13\",\"lessThan\":\"f8b8f1d4bb76098e87b8269a0631019648330e6d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"538950a1b7527a0a52ccd9337e3fcd304f027f13\",\"lessThan\":\"298db6167f81e9c470a57cf652e4e47757b4293e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"538950a1b7527a0a52ccd9337e3fcd304f027f13\",\"lessThan\":\"87dfb977bdb6eaa47e9993a34e18f44970f88b1f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"538950a1b7527a0a52ccd9337e3fcd304f027f13\",\"lessThan\":\"90e47dc5c572d1c73971ac51c7428803f42b78eb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"538950a1b7527a0a52ccd9337e3fcd304f027f13\",\"lessThan\":\"18fc650ccd7fe3376eca89203668cfb8268f60df\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/core/filter.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.5\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.5\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.259\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.210\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.176\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.143\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.94\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.36\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.13\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"affectedData\":[{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 10\",\"defaultStatus\":\"affected\",\"collectionURL\":\"https://access.redhat.com/downloads/content/package-browser/\",\"packageName\":\"kernel\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:10\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 6\",\"defaultStatus\":\"unknown\",\"collectionURL\":\"https://access.redhat.com/downloads/content/package-browser/\",\"packageName\":\"kernel\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:6\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 7\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://access.redhat.com/downloads/content/package-browser/\",\"packageName\":\"kernel\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:7\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 7\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://access.redhat.com/downloads/content/package-browser/\",\"packageName\":\"kernel-rt\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:7\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 8\",\"defaultStatus\":\"affected\",\"collectionURL\":\"https://access.redhat.com/downloads/content/package-browser/\",\"packageName\":\"kernel\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:8\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 8\",\"defaultStatus\":\"affected\",\"collectionURL\":\"https://access.redhat.com/downloads/content/package-browser/\",\"packageName\":\"kernel-rt\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:8\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 9\",\"defaultStatus\":\"affected\",\"collectionURL\":\"https://access.redhat.com/downloads/content/package-browser/\",\"packageName\":\"kernel\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:9\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 9\",\"defaultStatus\":\"affected\",\"collectionURL\":\"https://access.redhat.com/downloads/content/package-browser/\",\"packageName\":\"kernel-rt\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:9\"]}]},{\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\",\"affectedData\":[{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIPLUS S7-1500 CPU 1518-4 PN/DP 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Party Advisory\"]},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=2490779\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"tags\":[\"Issue Tracking\",\"Third Party Advisory\"]},{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-019113.html\",\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\"},{\"url\":\"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52910.json\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"tags\":[\"Third Party Advisory\"]}]}}",
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-07-15T01:12:54+00:00",
"cve": "CVE-2026-52910",
"id": "CVE-2026-52910",
"initial_release_date": "2026-06-19T00:00:00+00:00",
"product_status:known_affected": "246",
"product_status:known_not_affected": "28",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: bpf: Free reuseport cBPF prog after RCU grace period",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52910.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-09-10T17:01:00Z",
"cve": "CVE-2026-52910",
"id": "CVE-2026-52910",
"initial_release_date": "2026-06-23T02:20:09Z",
"product_status:first_fixed": "109",
"product_status:known_affected": "672",
"product_status:known_not_affected": "6",
"product_status:recommended": "273",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-52910",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-52910.json",
"version": "15"
}
}
}
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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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