SB2026102280 - Race condition in Linux kernel damon

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Main Vulnerability Database SB2026102280

SB2026102280 - Race condition in Linux kernel damon

Published: October 22, 2026

Security Bulletin ID SB2026102280
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-2026-98505)

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

CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local user to potentially cause hardware-updated page table state, including dirty bits, to be lost.

The vulnerability exists due to a race condition in damon_hugetlb_mkold() in mm/damon/vaddr.c when clearing the accessed bit in a huge page table entry while hardware updates the same entry. A local user can potentially cause memory writes to overlap with this operation, allowing the function to overwrite hardware-updated dirty bits with a stale page table entry.


Remediation

Install update from vendor's website.

References