{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47324","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-05-21T14:28:16.974Z","datePublished":"2024-05-21T14:35:37.844Z","dateUpdated":"2025-12-18T11:36:44.545Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-12-18T11:36:44.545Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwatchdog: Fix possible use-after-free in wdt_startup()\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/sbc60xxwdt.c"],"versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"63a3dc24bd053792f84cb4eef0168b1266202a02","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"862f2b5a7c38762ac9e369daefbf361a91aca685","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"0ac50a76cf3cd63db000648b3b19f3f98b8aaa76","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"dc9403097be52d57a5c9c35efa9be79d166a78af","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"146cc288fb80c662c9c35e7bc58325d1ac0a7875","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"a397cb4576fc2fc802562418b3a50b8f67d60d31","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"b4ebf4a4692e84163a69444c70ad515de06e2259","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"8adbbe6c86bb13e14f8a19e036ae5f4f5661fd90","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"c08a6b31e4917034f0ed0cb457c3bb209576f542","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/sbc60xxwdt.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/63a3dc24bd053792f84cb4eef0168b1266202a02"},{"url":"https://git.kernel.org/stable/c/862f2b5a7c38762ac9e369daefbf361a91aca685"},{"url":"https://git.kernel.org/stable/c/0ac50a76cf3cd63db000648b3b19f3f98b8aaa76"},{"url":"https://git.kernel.org/stable/c/dc9403097be52d57a5c9c35efa9be79d166a78af"},{"url":"https://git.kernel.org/stable/c/146cc288fb80c662c9c35e7bc58325d1ac0a7875"},{"url":"https://git.kernel.org/stable/c/a397cb4576fc2fc802562418b3a50b8f67d60d31"},{"url":"https://git.kernel.org/stable/c/b4ebf4a4692e84163a69444c70ad515de06e2259"},{"url":"https://git.kernel.org/stable/c/8adbbe6c86bb13e14f8a19e036ae5f4f5661fd90"},{"url":"https://git.kernel.org/stable/c/c08a6b31e4917034f0ed0cb457c3bb209576f542"}],"title":"watchdog: 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