SB2026072171 - Improper input validation in Linux kernel events intel

Description

This security bulletin contains information about 1 vulnerability.

1) Improper input validation (CVE-ID: CVE-2026-53370)

CWE-ID: CWE-20 - Improper input validation

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 input validation in intel_pmu_acr_late_setup() when processing user-supplied ACR masks. A local user can supply a crafted attr.config2 mask to cause a denial of service.

The issue involves incomplete validation of ACR mask bits, skipping configuration of subsequent ACR groups on invalid input, and reuse of stale hardware ACR mask state.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/5ad732a56be46aabf158c16aa0c095291727aaef
• https://git.kernel.org/stable/c/aab56b95bee3ff79176b13443cd9d7cfe9747df0
• https://git.kernel.org/stable/c/c05e01cef47d9b4969eae2dcf9467e2a555bcb4f