CVE-2025-21817

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-21817", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-29T08:45:45.774Z", "datePublished": "2025-02-27T20:04:15.988Z", "dateUpdated": "2026-11-05T20:41:45.114Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-07T15:44:41.250Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: mark GFP_NOIO around sysfs ->store()\n\nsysfs ->store is called with queue freezed, meantime we have several\n->store() callbacks(update_nr_requests, wbt, scheduler) to allocate\nmemory with GFP_KERNEL which may run into direct reclaim code path,\nthen potential deadlock can be caused.\n\nFix the issue by marking NOIO around sysfs ->store()"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["block/blk-sysfs.c"], "versions": [{"version": "1645cd7fd42c236c952e9228badcac4fea1829ea", "lessThan": "a09280c39ea54080daf19cfaf4a3121a8d17d5cd", "status": "affected", "versionType": "git"}, {"version": "8985da5481562e96b95e94ed8e5cc9b6565eb82b", "lessThan": "2566ce907e5d5db8a039647208e029ce559baa31", "status": "affected", "versionType": "git"}, {"version": "c99f66e4084a62a2cc401c4704a84328aeddc9ec", "lessThan": "7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["block/blk-sysfs.c"], "versions": [{"version": "6.12.96", "lessThan": "6.12.109", "status": "affected", "versionType": "semver"}, {"version": "6.13.2", "lessThan": "6.13.3", "status": "affected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.96", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13.2", "versionEndExcluding": "6.13.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a09280c39ea54080daf19cfaf4a3121a8d17d5cd"}, {"url": "https://git.kernel.org/stable/c/2566ce907e5d5db8a039647208e029ce559baa31"}, {"url": "https://git.kernel.org/stable/c/7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c"}], "title": "block: mark GFP_NOIO around sysfs ->store()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-21817", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-05T20:35:34.232076Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-05T20:41:45.114Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-21817", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-05T20:35:34.232076Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-05T20:35:35.259Z"}}], "cna": {"title": "block: mark GFP_NOIO around sysfs ->store()", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "1645cd7fd42c236c952e9228badcac4fea1829ea", "lessThan": "a09280c39ea54080daf19cfaf4a3121a8d17d5cd", "versionType": "git"}, {"status": "affected", "version": "8985da5481562e96b95e94ed8e5cc9b6565eb82b", "lessThan": "2566ce907e5d5db8a039647208e029ce559baa31", "versionType": "git"}, {"status": "affected", "version": "c99f66e4084a62a2cc401c4704a84328aeddc9ec", "lessThan": "7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c", "versionType": "git"}], "programFiles": ["block/blk-sysfs.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.12.96", "lessThan": "6.12.109", "versionType": "semver"}, {"status": "affected", "version": "6.13.2", "lessThan": "6.13.3", "versionType": "semver"}], "programFiles": ["block/blk-sysfs.c"], "defaultStatus": "unaffected"}], "references": [{"url": "https://git.kernel.org/stable/c/a09280c39ea54080daf19cfaf4a3121a8d17d5cd"}, {"url": "https://git.kernel.org/stable/c/2566ce907e5d5db8a039647208e029ce559baa31"}, {"url": "https://git.kernel.org/stable/c/7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: mark GFP_NOIO around sysfs ->store()\n\nsysfs ->store is called with queue freezed, meantime we have several\n->store() callbacks(update_nr_requests, wbt, scheduler) to allocate\nmemory with GFP_KERNEL which may run into direct reclaim code path,\nthen potential deadlock can be caused.\n\nFix the issue by marking NOIO around sysfs ->store()"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.109", "versionStartIncluding": "6.12.96"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.13.3", "versionStartIncluding": "6.13.2"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-07T15:44:41.250Z"}}}, "cveMetadata": {"cveId": "CVE-2025-21817", "state": "PUBLISHED", "dateUpdated": "2026-11-05T20:41:45.114Z", "dateReserved": "2024-12-29T08:45:45.774Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-02-27T20:04:15.988Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["block/blk-sysfs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "a09280c39ea54080daf19cfaf4a3121a8d17d5cd", "status": "affected", "version": "1645cd7fd42c236c952e9228badcac4fea1829ea", "versionType": "git"}, {"lessThan": "2566ce907e5d5db8a039647208e029ce559baa31", "status": "affected", "version": "8985da5481562e96b95e94ed8e5cc9b6565eb82b", "versionType": "git"}, {"lessThan": "7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c", "status": "affected", "version": "c99f66e4084a62a2cc401c4704a84328aeddc9ec", "versionType": "git"}]}, {"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["block/blk-sysfs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "6.12.109", "status": "affected", "version": "6.12.96", "versionType": "semver"}, {"lessThan": "6.13.3", "status": "affected", "version": "6.13.2", "versionType": "semver"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:6.13.2:*:*:*:*:*:*:*", "matchCriteriaId": "87D43B7A-D234-4A8A-9769-AAC59CA2B99D", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: mark GFP_NOIO around sysfs ->store()\n\nsysfs ->store is called with queue freezed, meantime we have several\n->store() callbacks(update_nr_requests, wbt, scheduler) to allocate\nmemory with GFP_KERNEL which may run into direct reclaim code path,\nthen potential deadlock can be caused.\n\nFix the issue by marking NOIO around sysfs ->store()"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: block: mark GFP_NOIO around sysfs ->store() sysfs ->store se llama con la cola congelada, mientras tanto tenemos varias devoluciones de llamadas ->store() (update_nr_requests, wbt, scheduler) para asignar memoria con GFP_KERNEL que puede ejecutarse en una ruta de c\u00f3digo de recuperaci\u00f3n directa, lo que puede provocar un posible bloqueo. Solucione el problema marcando NOIO alrededor de sysfs ->store()"}], "id": "CVE-2025-21817", "lastModified": "2026-11-05T21:17:43.547", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-21817", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-05T20:35:34.232076Z", "version": "2.0.3"}}]}, "published": "2025-02-27T20:16:04.243", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2566ce907e5d5db8a039647208e029ce559baa31"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a09280c39ea54080daf19cfaf4a3121a8d17d5cd"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-667"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: block: mark GFP_NOIO around sysfs ->store()", "id": "2348899", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2348899"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-833", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nblock: mark GFP_NOIO around sysfs ->store()\nsysfs ->store is called with queue freezed, meantime we have several\n->store() callbacks(update_nr_requests, wbt, scheduler) to allocate\nmemory with GFP_KERNEL which may run into direct reclaim code path,\nthen potential deadlock can be caused.\nFix the issue by marking NOIO around sysfs ->store()"], "name": "CVE-2025-21817", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-02-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-21817\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-21817\nhttps://lore.kernel.org/linux-cve-announce/2025022710-CVE-2025-21817-2fc8@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-06-23T19:32:00.363001+00:00", "updated": "2025-06-23T19:32:00.363049+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}