SB20260424264 - Race condition in Linux kernel softleaf_to_folio() and softleaf_to_page()

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Main Vulnerability Database SB20260424264

SB20260424264 - Race condition in Linux kernel softleaf_to_folio() and softleaf_to_page()

Published: April 24, 2026

Security Bulletin ID SB20260424264
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Race condition (CVE-ID: CVE-2026-31466)

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

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a race condition in softleaf_to_folio() and softleaf_to_page() when handling migration entries during concurrent folio splitting and zap_nonpresent_ptes() processing. A local user can trigger the race to cause a denial of service.

The issue can result in VM_WARN_ON_ONCE() being triggered, and on systems before commit 93976a20345b it can manifest as a BUG_ON().


Remediation

Install update from vendor's website.

References