SB2026081304 - Race condition in Linux kernel mm

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Main Vulnerability Database SB2026081304

SB2026081304 - Race condition in Linux kernel mm

Published: August 13, 2026

Security Bulletin ID SB2026081304
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Race condition (CVE-ID: CVE-2026-68086)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause data loss.

The vulnerability exists due to improper synchronization in mm/khugepaged collapse_file() when collapsing file-backed transparent huge pages in the presence of previously dirtied folios. A local user can write to a file, close it, and trigger a collapse operation to cause data loss.

The issue occurs in an edge case where dirty folios from previous writers can be discarded during page cache truncation after a later writable open.


Remediation

Install update from vendor's website.

References