SB2026050945 - Improper Check or Handling of Exceptional Conditions in Linux kernel events intel

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2026-43344)

CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions

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 handling of offline CPU and topology lookup conditions in the Intel uncore PMON initialization logic when initializing uncore PCI devices on affected platforms. A local user can trigger the vulnerable code path to cause a denial of service.

The issue can occur when all CPUs associated with a UBOX device are offline or when NUMA is disabled on a NUMA-capable platform.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/6a5dc3ee97581da2907fc7acd62853f07184de67
• https://git.kernel.org/stable/c/a16d1ec4dd0cdcf689f324adde6067083bce9099