Improper control of a resource through its lifetime in Linux kernel - CVE-2026-80623
Published: August 28, 2026
Vulnerability identifier: #VU146254
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2026-80623
CWE-ID: CWE-664
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper state management in the coresight etm4x/ete power management handling when powering down CPUs while using coresight tracing. A local user can trigger CPU power management events while tracing is active to cause a denial of service.
This affects system register ETMs, ETE devices, and ACPI-based systems where trace state is not preserved across CPU power down.
Affected software
Linux kernel
How to mitigate CVE-2026-80623
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3