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CVE-2026-97904

cpufreq: initialize policy rwsem before sysfs publication

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111, and 2 more
None on Exploit-DB, Metasploit or GitHub

Summary

In the Linux kernel, the following vulnerability has been resolved: cpufreq: initialize policy rwsem before sysfs publication cpufreq_policy_alloc() initializes policy->rwsem after kobject_init_and_add() has created the policy sysfs directory and its default attributes. A sysfs access can therefore reach a policy callback before the semaphore has been initialized. Initialize policy->rwsem before publishing the policy kobject so sysfs callbacks always see an initialized semaphore.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From 2fc3384dc75bf7333384c7a16d12c796f61c3f56 · fixed in c9d8435814f2ac533c40fe3f35d94235bc3a9443; From 2fc3384dc75bf7333384c7a16d12c796f61c3f56 · fixed in 82a54923700da5de83ce2b26c0b43f6b5005c8f1; From 2fc3384dc75bf7333384c7a16d12c796f61c3f56 · fixed in b14987a0f73777644099f47f01aba3b0f9dc6c27; From 2fc3384dc75bf7333384c7a16d12c796f61c3f56 · fixed in b22193eea2ce32c39dda5e09f9c2be2f3fd7eb4a; From 2fc3384dc75bf7333384c7a16d12c796f61c3f56 · fixed in dc11263cb05ed519758fd135fe08d611bad1f241; From 2fc3384dc75bf7333384c7a16d12c796f61c3f56 · fixed in 27c9b491bf7604e83b50c3bbfa18a30266ff345f; From 2fc3384dc75bf7333384c7a16d12c796f61c3f56 · fixed in 2cee937f779f69b195b37bbec1e888da9bfe9d58; From 2fc3384dc75bf7333384c7a16d12c796f61c3f56 · fixed in 3e5d1bf4bd687beb2cb4e32a07af695455925588

  • Linux Linux

    4.2

  • KernelLinux

    From 4.2.0 · fixed in 5.10.271; From 5.11.0 · fixed in 5.15.222; From 5.16.0 · fixed in 6.1.189; From 6.2.0 · fixed in 6.6.158; From 6.7.0 · fixed in 6.12.111; From 6.13.0 · fixed in 6.18.53; From 6.19.0 · fixed in 7.2.7

References 8

git.kernel.org