Description

In the Linux kernel, the following vulnerability has been resolved: procfs: fix possible double mmput() in do_procmap_query() When user provides incorrectly sized buffer for build ID for PROCMAP_QUERY we return with -ENAMETOOLONG error. After recent changes this condition happens later, after we unlocked mmap_lock/per-VMA lock and did mmput(), so original goto out is now wrong and will double-mmput() mm_struct. Fix by jumping further to clean up only vm_file and name_buf.

INFO

Published Date :

2026-05-06T11:27:51.524Z

Last Modified :

2026-05-08T12:40:59.592Z

Source :

Linux
AFFECTED PRODUCTS

The following products are affected by CVE-2026-43178 vulnerability.

Vendors Products
Linux
  • Linux Kernel
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-43178.

URL Resource
https://git.kernel.org/stable/c/61dc9f776705d6db6847c101b98fa4f0e9eb6fa3 cve-icon cve-icon
https://git.kernel.org/stable/c/8adaff87db143583e08eec4f4e7788f1ef8af94d cve-icon cve-icon
https://git.kernel.org/stable/c/90f5e87c9b75833b9ef3a4415b92c0247f28ab2f cve-icon cve-icon
https://git.kernel.org/stable/c/f9fe092084cd04deea18747f58a2304026e76aaa cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2026050638-CVE-2026-43178-3c95@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-43178 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-43178 cve-icon
Login to claim this CVE

CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact