CVE-2026-43178

HighCVSS 7.8/10Last modified Jul 15, 2026

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.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-415CWE-1341

Affected software

No affected versions have been published.

Timeline

Published
May 6, 2026
Last modified
Jul 15, 2026
NVD status
Modified

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CVE-2026-43178: High severity, CVSS 7.8 | Vulnix