{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-21893","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-12-29T08:45:45.783Z","datePublished":"2025-03-31T19:41:46.137Z","dateUpdated":"2026-05-11T21:08:33.681Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:08:33.681Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nkeys: Fix UAF in key_put()\n\nOnce a key's reference count has been reduced to 0, the garbage collector\nthread may destroy it at any time and so key_put() is not allowed to touch\nthe key after that point.  The most key_put() is normally allowed to do is\nto touch key_gc_work as that's a static global variable.\n\nHowever, in an effort to speed up the reclamation of quota, this is now\ndone in key_put() once the key's usage is reduced to 0 - but now the code\nis looking at the key after the deadline, which is forbidden.\n\nFix this by using a flag to indicate that a key can be gc'd now rather than\nlooking at the key's refcount in the garbage collector."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/key.h","security/keys/gc.c","security/keys/key.c"],"versions":[{"version":"9578e327b2b4935a25d49e3891b8fcca9b6c10c6","lessThan":"6afe2ea2daec156bd94ad2c5a6f4f4c48240dcd3","status":"affected","versionType":"git"},{"version":"9578e327b2b4935a25d49e3891b8fcca9b6c10c6","lessThan":"f6a3cf833188e897c97028cd7b926e3f2cb1a8c0","status":"affected","versionType":"git"},{"version":"9578e327b2b4935a25d49e3891b8fcca9b6c10c6","lessThan":"75845c6c1a64483e9985302793dbf0dfa5f71e32","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/key.h","security/keys/gc.c","security/keys/key.c"],"versions":[{"version":"6.10","status":"affected"},{"version":"0","lessThan":"6.10","status":"unaffected","versionType":"semver"},{"version":"6.12.21","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.13.9","lessThanOrEqual":"6.13.*","status":"unaffected","versionType":"semver"},{"version":"6.14","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"6.12.21"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"6.13.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"6.14"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/6afe2ea2daec156bd94ad2c5a6f4f4c48240dcd3"},{"url":"https://git.kernel.org/stable/c/f6a3cf833188e897c97028cd7b926e3f2cb1a8c0"},{"url":"https://git.kernel.org/stable/c/75845c6c1a64483e9985302793dbf0dfa5f71e32"}],"title":"keys: Fix UAF in key_put()","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.8,"attackVector":"LOCAL","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"id":"CVE-2025-21893","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2025-03-31T20:45:39.862234Z"}}}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","cweId":"CWE-416","description":"CWE-416 Use After Free"}]}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-03-31T20:53:50.193Z"}}]}}