Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: crypto: jitterentropy - replace long-held spinlock with mutex jent_kcapi_random() serializes the shared jitterentropy state, but it currently holds a spinlock across the jent_read_entropy() call. That path performs expensive jitter collection and SHA3 conditioning, so parallel readers can trigger stalls as contending waiters spin for the same lock. To prevent non-preemptible lock hold, replace rng->jent_lock with a mutex so contended readers sleep instead of spinning on a shared lock held across expensive entropy generation.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.2, < 6.6.141 |
References
- https://git.kernel.org/stable/c/01d798e9feb30212952d4e992801ba6bd6a82351Patch
- https://git.kernel.org/stable/c/18216b8ab6904753eaf31baf453cb02ecd202ba4Patch
- https://git.kernel.org/stable/c/4c03e6eb98443dc4d6d422a9780034a5b75376b4Patch
- https://git.kernel.org/stable/c/ec427dc5286da1ed08f2d510e2147a7581b0cb02Patch
- https://git.kernel.org/stable/c/ff734dbd9e2432601a6dcd167cfb0bf8a36d1880Patch
FAQ
What is CVE-2026-52936?
CVE-2026-52936 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: crypto: jitterentropy - replace long-held spinlock with mutex jent_kcapi_random() serializes the shared jitterentropy state, but i...
How severe is CVE-2026-52936?
CVE-2026-52936 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-52936?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.