Improper input validation in Linux kernel - CVE-2026-53370
Published: July 21, 2026
Vulnerability identifier: #VU138895
CSH Severity: Low
CVSS v4.0: 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
CVE-ID: CVE-2026-53370
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
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.
How to mitigate CVE-2026-53370
Install security update from vendor's repository.