SB20260626125 - Deadlock in Linux kernel mm

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Main Vulnerability Database SB20260626125

SB20260626125 - Deadlock in Linux kernel mm

Published: June 26, 2026

Security Bulletin ID SB20260626125
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) Deadlock (CVE-ID: CVE-2026-53207)

CWE-ID: CWE-833 - Deadlock

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/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 recursive spinlock self-deadlock in get_huge_page_for_hwpoison() when handling concurrent madvise(MADV_HWPOISON) calls on the same hugetlb page while racing with a concurrent unmap. A local user can trigger concurrent madvise(MADV_HWPOISON) operations to cause a denial of service.

The issue occurs when folio_put() drops the folio reference count to zero while hugetlb_lock is still held, leading free_huge_folio() to attempt to re-acquire the same non-recursive lock.


Remediation

Install update from vendor's website.

References