cpufreq: initialize policy rwsem before sysfs publication
Key facts
- Attack vector
- —
- Privileges required
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- User interaction
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- Attack complexity
- —
- Impact type
- —
- Confidentiality · integrity · availability
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- Fix status
- Partial Red Hat: 7 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53, 7.2.7, 7.3
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-97904
- 2026-10-03 Alias added: GHSA-73ff-5qgw-vhj7
- 2026-10-03 Fix available: Linux/[email protected], Linux/[email protected], Linux/[email protected] +5 · CNA
- 2026-10-03 4 new references · CNA
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-11-07 Affected versions changed · Red Hat
References
Other 8
- https://git.kernel.org/stable/c/c9d8435814f2ac533c40fe3f35d94235bc3a9443
- https://git.kernel.org/stable/c/82a54923700da5de83ce2b26c0b43f6b5005c8f1
- https://git.kernel.org/stable/c/b14987a0f73777644099f47f01aba3b0f9dc6c27
- https://git.kernel.org/stable/c/b22193eea2ce32c39dda5e09f9c2be2f3fd7eb4a
- https://git.kernel.org/stable/c/dc11263cb05ed519758fd135fe08d611bad1f241
- https://git.kernel.org/stable/c/27c9b491bf7604e83b50c3bbfa18a30266ff345f
- https://git.kernel.org/stable/c/2cee937f779f69b195b37bbec1e888da9bfe9d58
- https://git.kernel.org/stable/c/3e5d1bf4bd687beb2cb4e32a07af695455925588
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Sources
- CVE-2026-97904 · CVE Program
- CVE-2026-97904 · NVD
- FIRST EPSS
- GHSA-73ff-5qgw-vhj7 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-97904 · Red Hat security data · CC BY 4.0
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