Security Advisory

CVE-2026-43178

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-05-06 11:27:51

Last updated 2026-07-15 00:56:03

Assigner Linux

CVSS score 7.8

State PUBLISHED

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.

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