{"id":"CVE-2025-21995","state":"PUBLISHED","title":"drm/sched: Fix fence reference count leak","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/sched: Fix fence reference count leak\n\nThe last_scheduled fence leaks when an entity is being killed and adding\nthe cleanup callback fails.\n\nDecrement the reference count of prev when dma_fence_add_callback()\nfails, ensuring proper balance.\n\n[phasta: add git tag info for stable kernel]","publishedAt":"2025-04-03T07:18:59.178Z","updatedAt":"2026-05-11T21:10:36.364Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2fdb8a8f07c2f1353770a324fd19b8114e4329ac","status":"affected","lessThan":"c76bd3c99293834de7d1dca5de536616d5655e38","versionType":"git"},{"version":"2fdb8a8f07c2f1353770a324fd19b8114e4329ac","status":"affected","lessThan":"1135a9431160575466ea9ac37ebd756ecbe35fff","versionType":"git"},{"version":"2fdb8a8f07c2f1353770a324fd19b8114e4329ac","status":"affected","lessThan":"35399c84dcedd6d31448fb9e1336ef52673f2882","versionType":"git"},{"version":"2fdb8a8f07c2f1353770a324fd19b8114e4329ac","status":"affected","lessThan":"a952f1ab696873be124e31ce5ef964d36bce817f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/scheduler/sched_entity.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.2","versionType":"semver"},{"version":"6.6.85","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.21","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.13.9","status":"unaffected","lessThanOrEqual":"6.13.*","versionType":"semver"},{"version":"6.14","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/scheduler/sched_entity.c"]}],"references":["https://git.kernel.org/stable/c/c76bd3c99293834de7d1dca5de536616d5655e38","https://git.kernel.org/stable/c/1135a9431160575466ea9ac37ebd756ecbe35fff","https://git.kernel.org/stable/c/35399c84dcedd6d31448fb9e1336ef52673f2882","https://git.kernel.org/stable/c/a952f1ab696873be124e31ce5ef964d36bce817f"],"weaknesses":[],"ingestedAt":"2026-10-29T20:08:39.238Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/21xxx/CVE-2025-21995.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-21995","state":"PUBLISHED","datePublished":"2025-04-03T07:18:59.178Z","dateUpdated":"2026-05-11T21:10:36.364Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-12-29T08:45:45.801Z"},"containers":{"cna":{"title":"drm/sched: Fix fence reference count leak","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/sched: Fix fence reference count leak\n\nThe last_scheduled fence leaks when an entity is being killed and adding\nthe cleanup callback fails.\n\nDecrement the reference count of prev when dma_fence_add_callback()\nfails, ensuring proper balance.\n\n[phasta: add git tag info for stable kernel]"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2fdb8a8f07c2f1353770a324fd19b8114e4329ac","status":"affected","lessThan":"c76bd3c99293834de7d1dca5de536616d5655e38","versionType":"git"},{"version":"2fdb8a8f07c2f1353770a324fd19b8114e4329ac","status":"affected","lessThan":"1135a9431160575466ea9ac37ebd756ecbe35fff","versionType":"git"},{"version":"2fdb8a8f07c2f1353770a324fd19b8114e4329ac","status":"affected","lessThan":"35399c84dcedd6d31448fb9e1336ef52673f2882","versionType":"git"},{"version":"2fdb8a8f07c2f1353770a324fd19b8114e4329ac","status":"affected","lessThan":"a952f1ab696873be124e31ce5ef964d36bce817f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/scheduler/sched_entity.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.2","versionType":"semver"},{"version":"6.6.85","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.21","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.13.9","status":"unaffected","lessThanOrEqual":"6.13.*","versionType":"semver"},{"version":"6.14","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/scheduler/sched_entity.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c76bd3c99293834de7d1dca5de536616d5655e38"},{"url":"https://git.kernel.org/stable/c/1135a9431160575466ea9ac37ebd756ecbe35fff"},{"url":"https://git.kernel.org/stable/c/35399c84dcedd6d31448fb9e1336ef52673f2882"},{"url":"https://git.kernel.org/stable/c/a952f1ab696873be124e31ce5ef964d36bce817f"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:10:36.364Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.85"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.12.21"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.13.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.14"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2025-10-01T18:15:25.572495Z","id":"CVE-2025-21995","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"type":"CWE","lang":"en","description":"CWE-noinfo Not enough information"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-10-01T18:15:29.450Z"}}]}}}