CVE-2026-52936 - crypto: jitterentropy - replace long-held spinlock with mutex
CVE ID :CVE-2026-52936
Published : June 24, 2026, 7:14 a.m. | 2 hours, 26 minutes ago
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.
Severity: 0.0 | NA
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Published : June 24, 2026, 7:14 a.m. | 2 hours, 26 minutes ago
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.
Severity: 0.0 | NA
Visit the link for more details, such as CVSS details, affected products, timeline, and more...