---
id: CVE-2026-92485
title: |-
  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
summary: |-
  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…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 2b5dcb31a19a2e0acd869b12c9db9b2d696ef544 <
    48a0209d8da0d90a7b0a0db19d1ff88027b13781
  - >-
    Linux >= 2b5dcb31a19a2e0acd869b12c9db9b2d696ef544 <
    61aaa8782bec59ecffd22e030f54ef9351bcabf9
  - Linux 605c8d8f9966fcd2f0b858fabebe416fc83f2209
  - Linux 028480eaf2a1401e914a1fa1a4a21d877cf0ae30
  - Linux 8f873cc3f67f2257493063e57d0caf07ef889ee9
  - Linux >= 6.1.72 < 6.2
  - Linux >= 6.5.12 < 6.6
  - Linux >= 6.6.2 < 6.7
  - Linux 6.7
published: '2026-09-17'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T18:18:12.610'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-92485'
references:
  - url: 'https://git.kernel.org/stable/c/48a0209d8da0d90a7b0a0db19d1ff88027b13781'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/61aaa8782bec59ecffd22e030f54ef9351bcabf9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00154
epssPercentile: 0.04907
ingestedAt: '2026-09-17T16:21:47.787Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.