---
id: CVE-2026-93111
title: |-
  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 attach…
summary: |-
  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 attach…
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 >= aef4dfa790b22d8052cfb78044eadbe03c876c39 <
    280145253fd38fa975cc04963ddaf74c7f415011
  - >-
    Linux >= aef4dfa790b22d8052cfb78044eadbe03c876c39 <
    30bdd6d1384d894931f113eb595636092d8e650c
  - Linux 7.2
published: '2026-09-17'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T18:18:20.993'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93111'
references:
  - url: 'https://git.kernel.org/stable/c/280145253fd38fa975cc04963ddaf74c7f415011'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/30bdd6d1384d894931f113eb595636092d8e650c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00165
epssPercentile: 0.05082
ingestedAt: '2026-09-17T16:21:47.754Z'
---

## Overview

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().

## Remediation

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