SB2026050923 - Improper control of a resource through its lifetime in Linux kernel kernel apic

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Main Vulnerability Database SB2026050923

SB2026050923 - Improper control of a resource through its lifetime in Linux kernel kernel apic

Published: May 9, 2026

Security Bulletin ID SB2026050923
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) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-43363)

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

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 improper hardware state management in lapic_resume() when resuming from s2ram. A local user can trigger a suspend and resume cycle to cause a denial of service.

This occurs when firmware re-enables x2apic mode while the kernel continues using the xapic interface, which can lead to system hangs on bare metal systems.


Remediation

Install update from vendor's website.

References