PT-2026-51729 · Linux · Linux
Published
2026-06-24
·
Updated
2026-06-24
·
CVE-2026-52936
None
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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.
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Related Identifiers
Affected Products
Linux