{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2021-47323", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-21T14:28:16.974Z", "datePublished": "2024-05-21T14:35:37.181Z", "dateUpdated": "2026-05-11T13:52:16.603Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T13:52:16.603Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwatchdog: sc520_wdt: Fix possible use-after-free in wdt_turnoff()\n\nThis module's remove path calls del_timer(). However, that function\ndoes not wait until the timer handler finishes. This means that the\ntimer handler may still be running after the driver's remove function\nhas finished, which would result in a use-after-free.\n\nFix by calling del_timer_sync(), which makes sure the timer handler\nhas finished, and unable to re-schedule itself." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/watchdog/sc520_wdt.c" ], "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "0015581a79bbf8e521f85dddb7d3e4a66b9f51d4", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "b4565a8a2d6bffb05bfbec11399d261ec16fe373", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "2aef07017fae21c3d8acea9656b10e3b9c0f1e04", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "522e75ed63f67e815d4ec0deace67df22d9ce78e", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "7c56c5508dc20a6b133bc669fc34327a6711c24c", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "a173e3b62cf6dd3c4a0a10c8a82eedfcae81a566", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "b3c41ea5bc34d8c7b19e230d80e0e555c6f5057d", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "f0feab82f6a0323f54d85e8b512a2be64f83648a", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "90b7c141132244e8e49a34a4c1e445cce33e07f4", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/watchdog/sc520_wdt.c" ], "versions": [ { "version": "2.6.12", "status": "affected" }, { "version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver" }, { "version": "4.4.276", "lessThanOrEqual": "4.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.9.276", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.240", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.198", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.134", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.52", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.12.19", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.13.4", "lessThanOrEqual": "5.13.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.14", "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": "2.6.12", "versionEndExcluding": "4.4.276" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "4.9.276" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "4.14.240" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "4.19.198" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.4.134" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.10.52" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.12.19" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.13.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.14" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/0015581a79bbf8e521f85dddb7d3e4a66b9f51d4" }, { "url": "https://git.kernel.org/stable/c/b4565a8a2d6bffb05bfbec11399d261ec16fe373" }, { "url": "https://git.kernel.org/stable/c/2aef07017fae21c3d8acea9656b10e3b9c0f1e04" }, { "url": "https://git.kernel.org/stable/c/522e75ed63f67e815d4ec0deace67df22d9ce78e" }, { "url": "https://git.kernel.org/stable/c/7c56c5508dc20a6b133bc669fc34327a6711c24c" }, { "url": "https://git.kernel.org/stable/c/a173e3b62cf6dd3c4a0a10c8a82eedfcae81a566" }, { "url": "https://git.kernel.org/stable/c/b3c41ea5bc34d8c7b19e230d80e0e555c6f5057d" }, { "url": "https://git.kernel.org/stable/c/f0feab82f6a0323f54d85e8b512a2be64f83648a" }, { "url": "https://git.kernel.org/stable/c/90b7c141132244e8e49a34a4c1e445cce33e07f4" } ], "title": "watchdog: sc520_wdt: Fix possible use-after-free in wdt_turnoff()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "problemTypes": [ { "descriptions": [ { "type": "CWE", "cweId": "CWE-416", "lang": "en", "description": "CWE-416 Use After Free" } ] } ], "affected": [ { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*" ], "defaultStatus": "affected", "versions": [ { "version": "1da177e4c3f4", "status": "affected", "lessThan": "0015581a79bb", "versionType": "git" }, { "version": "1da177e4c3f4", "status": "affected", "lessThan": "b4565a8a2d6b", "versionType": "git" }, { "version": "1da177e4c3f4", "status": "affected", "lessThan": "2aef07017fae", "versionType": "git" }, { "version": "1da177e4c3f4", "status": "affected", "lessThan": "522e75ed63f6", "versionType": "git" }, { "version": "1da177e4c3f4", "status": "affected", "lessThan": "7c56c5508dc2", "versionType": "git" }, { "version": "1da177e4c3f4", "status": "affected", "lessThan": "a173e3b62cf6", "versionType": "git" }, { "version": "1da177e4c3f4", "status": "affected", "lessThan": "b3c41ea5bc34", "versionType": "git" }, { "version": "1da177e4c3f4", "status": "affected", "lessThan": "f0feab82f6a0", "versionType": "git" }, { "version": "1da177e4c3f4", "status": "affected", "lessThan": "90b7c1411322", "versionType": "git" }, { "version": "4.4.276", "status": "unaffected", "lessThan": "4.5", "versionType": "semver" }, { "version": "4.9.276", "status": "unaffected", "lessThan": "4.10", "versionType": "semver" }, { "version": "4.14.240", "status": "unaffected", "lessThan": "4.15", "versionType": "semver" }, { "version": "4.19.198", "status": "unaffected", "lessThan": "4.20", "versionType": "semver" }, { "version": "5.10.52", "status": "unaffected", "lessThan": "5.11", "versionType": "semver" }, { "version": "5.12.19", "status": "unaffected", "lessThan": "5.13", "versionType": "semver" }, { "version": "5.13.4", "status": "unaffected", "lessThan": "5.14", "versionType": "semver" }, { "version": "5.14", "status": "unaffected", "lessThanOrEqual": "*", "versionType": "semver" } ] } ], "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/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": { "timestamp": "2024-05-21T15:36:28.370702Z", "id": "CVE-2021-47323", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-04-09T13:29:10.765Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:32:08.471Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/0015581a79bbf8e521f85dddb7d3e4a66b9f51d4", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/b4565a8a2d6bffb05bfbec11399d261ec16fe373", "tags": [ "x_transferred" ] }, { "url": 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