What is CVE-2024-26686?

CVE-2024-26686 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Improper Locking flaw (CWE-667), affecting Linux kernel versions from 2.6.12 onward and patched in 5.10.237, 5.15.181, 6.1.82 and others. CVE-2024-26686 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-26686?

CVE-2024-26686 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2024-26686?

Yes, CVE-2024-26686 has been patched. Fixed versions include 5.10.237, 5.15.181, 6.1.82 and others. If you are running Linux kernel 2.6.12 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2024-26686 actively exploited?

CVE-2024-26686 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Improper Locking (CWE-667)?

The product does not properly acquire or release a lock, which can lead to unexpected behaviour. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/667.html

CVE-2024-26686

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. 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.

Package Linux Kernel

Published 2024-04-03

Last modified 2025-11-03

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-667

CVE-2024-26686 is a Improper Locking vulnerability

What is Improper Locking?

The product does not properly acquire or release a lock, which can lead to unexpected behaviour. Learn more on MITRE CWE

Affected versions

Linux kernel versions 2.6.12 and later are affected. Fixed in 5.10.237, 5.15.181, 6.1.82, 6.6.64, 6.7.6, 6.8 and their respective stable series.

Affected from

≥ 2.6.12

Fixed in

✓ 5.10.237 5.10.x ✓ 5.15.181 5.15.x ✓ 6.1.82 6.1.x ✓ 6.6.64 6.6.x ✓ 6.7.6 6.7.x ✓ 6.8

References

7 total

Kernel Git
https://git.kernel.org/stable/c/27978243f165b44e342f28f449b91327944ea071

Patch
Kernel Git
https://git.kernel.org/stable/c/3820b0fac7732a653bcc6f6ac20c1d72e697f8f6

Patch
Kernel Git
https://git.kernel.org/stable/c/7601df8031fd67310af891897ef6cc0df4209305

Patch
Kernel Git
https://git.kernel.org/stable/c/cf4b8c39b9a0bd81c47afc7ef62914a62dd5ec4d

Patch
Kernel Git
https://git.kernel.org/stable/c/0c35d1914353799c54fa1843fe7dea6fcbcdbac5

Showing 5 of 7 references View all on NVD

Details

CVE ID CVE-2024-26686

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-04-03

Modified 2025-11-03

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2024-26686?

CVE-2024-26686 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Improper Locking flaw (CWE-667) . It affects Linux kernel versions from 2.6.12 onward and has been patched in 5.10.237, 5.15.181, 6.1.82 and others. CVE-2024-26686 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-26686?

CVE-2024-26686 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2024-26686?

Yes. CVE-2024-26686 has been patched. Fixed versions include 5.10.237, 5.15.181, 6.1.82 and others. If you are running Linux kernel 2.6.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2024-26686 actively exploited?

No. CVE-2024-26686 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.