Use of uninitialized resource in Linux kernel - CVE-2026-97905
Published: September 28, 2026
Vulnerability identifier: #VU152573
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-97905
CWE-ID: CWE-908
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to invoke sysfs attribute callbacks on an uninitialized cpufreq policy.
The vulnerability exists due to use of uninitialized memory in the policy->cpus cpumask in cpufreq_policy_alloc() when a cpufreq policy is published to sysfs before initialization completes. A local user can access sysfs attributes during this initialization window to invoke callbacks on the uninitialized policy.
Only systems configured with CONFIG_CPUMASK_OFFSTACK=y are affected by the uninitialized separately allocated bitmap.
Affected software
Linux kernel
How to mitigate CVE-2026-97905
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3