CVE-2026-52936
- Source
- https://cve.org/CVERecord?id=CVE-2026-52936
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-52936.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-52936
- Downstream
- Related
- Published
- 2026-06-24T07:14:26Z
- Modified
- 2026-08-27T18:27:26Z
- Summary
- crypto: jitterentropy - replace long-held spinlock with mutex
- Details
-
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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52936.json" }- References
-
- https://git.kernel.org/stable/c/01d798e9feb30212952d4e992801ba6bd6a82351
- https://git.kernel.org/stable/c/18216b8ab6904753eaf31baf453cb02ecd202ba4
- https://git.kernel.org/stable/c/4c03e6eb98443dc4d6d422a9780034a5b75376b4
- https://git.kernel.org/stable/c/ec427dc5286da1ed08f2d510e2147a7581b0cb02
- https://git.kernel.org/stable/c/ff734dbd9e2432601a6dcd167cfb0bf8a36d1880
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52936.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-52936
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedbb5530e4082446aac3a3d69780cd4dbfa4520013Fixed18216b8ab6904753eaf31baf453cb02ecd202ba4Fixed4c03e6eb98443dc4d6d422a9780034a5b75376b4Fixedff734dbd9e2432601a6dcd167cfb0bf8a36d1880Fixedec427dc5286da1ed08f2d510e2147a7581b0cb02Fixed01d798e9feb30212952d4e992801ba6bd6a82351