What’s Vulnerable › Vulnerabilities

CVE-2024-56763: tracing: Prevent bad count for tracing_cpumask_write

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-01-06 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: tracing: Prevent bad count for tracing_cpumask_write If a large count is provided, it will trigger a warning in bitmap_parse_user. Also check zero for it.

Affected products

• Linux kernel: from 2.6.29 before 6.1.123; from 6.2 before 6.6.69; from 6.7 before 6.12.8; 6.13-rc1, 6.13-rc2, 6.13-rc3, 6.13-rc4 — fixed in 6.1.123, 6.12.8, 6.6.69

How to fix

Upgrade to a fixed version: Linux kernel 6.1.123, 6.12.8, 6.6.69. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/03041e474a6a8f1bfd4b96b164bb3165c48fa1a3
• https://git.kernel.org/stable/c/1cca920af19df5dd91254e5ff35e68e911683706
• https://git.kernel.org/stable/c/2558d753df0628d4187d8e1fd989339460f4f364
• https://git.kernel.org/stable/c/3d15f4c2449558ffe83b4dba30614ef1cd6937c3
• https://git.kernel.org/stable/c/98feccbf32cfdde8c722bc4587aaa60ee5ac33f0
• https://git.kernel.org/stable/c/f60172b447317cb6c5e74b5601a151866269baf6
• https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
• https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html

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