cpufreq: intel_pstate: Fix object lifecycle issue in update_qos_request()
Key facts
- Attack vector
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- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
- —
- Confidentiality · integrity · availability
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- Fix status
- Partial Red Hat: 3 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: intel_pstate: Fix object lifecycle issue in update_qos_request() The cpufreq_cpu_put() call in update_qos_request() takes place too early because the latter subsequently calls freq_qos_update_request() that indirectly accesses the policy object in question through the QoS request object passed to it. Fortunately, update_qos_request() is called under intel_pstate_driver_lock, so this issue does not matter for changing the intel_pstate operation mode, but it theoretically can cause a crash to occur on CPU device hot removal (which currently can only happen in virt, but it is formally supported nevertheless). Address this issue by modifying update_qos_request() to drop the reference to the policy later.
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 5.4.301, 5.10.246, 5.15.195, 6.1.157, 6.6.113, 6.12.54, 6.17.4, 6.18
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet |
| Red Hat Enterprise Linux 8 | Affected | No fix yet |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
Not affected: 2 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2025-40194
- 2026-10-03 Alias added: GHSA-8qw2-hj59-c25x
References
Other 8
- https://git.kernel.org/stable/c/15ac9579ebdaf22a37d7f60b3a8efc1029732ef9
- https://git.kernel.org/stable/c/bc26564bcc659beb6d977cd6eb394041ec2f2851
- https://git.kernel.org/stable/c/ad4e8f9bdbef11a19b7cb93e7f313bf59bdcc3b4
- https://git.kernel.org/stable/c/0a58d3e77b22b087a57831c87cafd360e144a5bd
- https://git.kernel.org/stable/c/69a18ff6c60e8e113420f15355fad862cb45d38e
- https://git.kernel.org/stable/c/ba63d4e9857a72a89e71a4eff9f2cc8c283e94c3
- https://git.kernel.org/stable/c/57e4a6aadf12578b96a038373cffd54b3a58b092
- https://git.kernel.org/stable/c/69e5d50fcf4093fb3f9f41c4f931f12c2ca8c467
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Sources
- CVE-2025-40194 · CVE Program
- CVE-2025-40194 · NVD
- FIRST EPSS
- GHSA-8qw2-hj59-c25x · GitHub Advisory Database · CC BY 4.0
- CVE-2025-40194 · Red Hat security data · CC BY 4.0
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