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🛡️ CVE-2025-37940 — debian-linux

🟡 CVSS 5.5 — Medium ✅ No Known Exploit CWE-667 NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

ftrace: Add cond_resched() to ftrace_graph_set_hash()

In the Linux kernel, the following vulnerability has been resolved:

ftrace: Add cond_resched() to ftrace_graph_set_hash()

When the kernel contains a large number of functions that can be traced,

the loop in ftrace_graph_set_hash() may take a lot of time to execute.

This may trigger the softlockup watchdog.

Add cond_resched() within the loop to allow the kernel to remain

responsive even when processing a large number of functions.

This matches the cond_resched() that is used in other locations of the

code that iterates over all functions that can be traced.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Weakness class

CVE-2025-37940 is classified as CWE-667: Improper Locking. The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.

Affected software

CVE-2025-37940 is recorded against 3 packages.

  • debian-linux
  • kernel (from 6.14.0 up to 6.14.3)
  • linux-kernel (from 6.14 up to 6.14.3)

Timeline and source

Published on 20 May 2025 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
lists.debian.org

CVE-2025-37940 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity MEDIUM
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE CWE-667
Public Exploit ✅ No
Source NVD
Published 2025-05-20
Updated 2026-08-20
Modified 2026-06-17

Affected Packages

Software From version Fixed in
debian-linux — —
kernel 6.14.0 6.14.3
linux-kernel 6.14 6.14.3

References

Similar Threats

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