High 7.8Published Sep 17, 2026

CVE-2026-92485bpf: Fix WARNING in bpf_tracing_link_release

Updated under an hour ago (2026-10-19 13:00 UTC)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix WARNING in bpf_tracing_link_release The trampoline could be corrupted by the blindly 'tr->flags = BPF_TRAMP_F_TAIL_CALL_CTX' in verifier. 1. A fexit attached to a tail_call_reachable prog. 'tr->flags' became 'BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_TAIL_CALL_CTX'. And, the trampoline would poke the target prog's nop insn using jmp insn instead of call insn. 2. Another fexit loaded with the same tail_call_reachable prog target. 'tr->flags' became 'BPF_TRAMP_F_TAIL_CALL_CTX'. 3. Close the first fexit link. Due to no BPF_TRAMP_F_CALL_ORIG in 'tr->flags', the trampoline will fail to restore the prog's nop insn using call insn. [ 3.410719] WARNING: kernel/bpf/syscall.c:3551 at bpf_tracing_link_release+0x53/0x60, CPU#1: test_progs/98 ... [ 3.428793] bpf_link_free+0x58/0x130 [ 3.429293] bpf_link_release+0x23/0x30 Fix the warning by updating 'tr->flags' with '|=' and lock.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 2b5dcb31a19a2e0acd869b12c9db9b2d696ef544 before 094f0a895cf97a993d06d5dc4c12e7cb7da845a5; from 2b5dcb31a19a2e0acd869b12c9db9b2d696ef544 before 48a0209d8da0d90a7b0a0db19d1ff88027b13781; from 2b5dcb31a19a2e0acd869b12c9db9b2d696ef544 before 61aaa8782bec59ecffd22e030f54ef9351bcabf9; 605c8d8f9966fcd2f0b858fabebe416fc83f2209; 028480eaf2a1401e914a1fa1a4a21d877cf0ae30; 8f873cc3f67f2257493063e57d0caf07ef889ee9; from 6.1.72 before 6.2; from 6.5.12 before 6.6; and 1 more ranges	CNA record

References

https://git.kernel.org/stable/c/094f0a895cf97a993d06d5dc4c12e7cb7da845a5
https://git.kernel.org/stable/c/48a0209d8da0d90a7b0a0db19d1ff88027b13781
https://git.kernel.org/stable/c/61aaa8782bec59ecffd22e030f54ef9351bcabf9

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.