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CVE-2024-26686

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children stats lock_task_sighand() can trigger a hard lockup.

Published Apr 3, 2024CWE-667EPSS 0.21%

Overview

CVE-2024-26686 is a medium-severity vulnerability. It was published on April 3, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children stats

lock_task_sighand() can trigger a hard lockup. If NR_CPUS threads call

do_task_stat() at the same time and the process has NR_THREADS, it will

spin with irqs disabled O(NR_CPUS * NR_THREADS) time.

Change do_task_stat() to use sig->stats_lock to gather the statistics

outside of ->siglock protected section, in the likely case this code will

run lockless.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/0c35d1914353799c54fa1843fe7dea6fcbcdbac5Refgit.kernel.org/stable/c/27978243f165b44e342f28f449b91327944ea071Refgit.kernel.org/stable/c/3820b0fac7732a653bcc6f6ac20c1d72e697f8f6Refgit.kernel.org/stable/c/4fe85bdaabd63f8f8579b24a10ed597c9c482164Refgit.kernel.org/stable/c/7601df8031fd67310af891897ef6cc0df4209305Refgit.kernel.org/stable/c/cf4b8c39b9a0bd81c47afc7ef62914a62dd5ec4dRefgit.kernel.org/stable/c/27978243f165b44e342f28f449b91327944ea071Refgit.kernel.org/stable/c/7601df8031fd67310af891897ef6cc0df4209305Refgit.kernel.org/stable/c/cf4b8c39b9a0bd81c47afc7ef62914a62dd5ec4dReflists.debian.org/debian-lts-announce/2025/05/msg00030.html

How CyberStrike helps

Frequently asked questions

What is CVE-2024-26686?

CVE-2024-26686 is a medium-severity vulnerability. It was published on April 3, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-26686?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-26686?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2024-26686?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-26686 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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