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| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwatchdog: Fix possible use-after-free by calling del_timer_sync()\n\nThis driver'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." |
| } |
| ], |
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| { |
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| "vendor": "Linux", |
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| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "drivers/watchdog/lpc18xx_wdt.c", |
| "drivers/watchdog/w83877f_wdt.c" |
| ], |
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| "status": "affected", |
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| ] |
| }, |
| { |
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| "vendor": "Linux", |
| "defaultStatus": "affected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "drivers/watchdog/lpc18xx_wdt.c", |
| "drivers/watchdog/w83877f_wdt.c" |
| ], |
| "versions": [ |
| { |
| "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", |
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| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "4.19.198", |
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| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.4.134", |
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| }, |
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| "versionType": "semver" |
| }, |
| { |
| "version": "5.12.19", |
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| "versionType": "semver" |
| }, |
| { |
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| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.14", |
| "lessThanOrEqual": "*", |
| "status": "unaffected", |
| "versionType": "original_commit_for_fix" |
| } |
| ] |
| } |
| ], |
| "cpeApplicability": [ |
| { |
| "nodes": [ |
| { |
| "operator": "OR", |
| "negate": false, |
| "cpeMatch": [ |
| { |
| "vulnerable": true, |
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| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionEndExcluding": "4.9.276" |
| }, |
| { |
| "vulnerable": true, |
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| "versionEndExcluding": "4.14.240" |
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| "versionEndExcluding": "5.14" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/58606882ad8ec6c39e0f40344b922921ef94ab4d" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/ca96b8ea5e74956071154bdb456778cc3027e79f" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/8bec568d7518b1504a602ed5376bb322e4dbb270" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/ecd620e0fb1ff7f78fdb593379b2e6938c99707a" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/db222f1477ad5692cd454709b714949807e5d111" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/66ba9cf929b1c4fabf545bd4c18f6f64e23e46e4" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/4c05dac488a660fe2925c047ecb119e7afaaeb1e" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/1a053c4d716898a53c2e31c574a70ea0c37044a3" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/d0212f095ab56672f6f36aabc605bda205e1e0bf" |
| } |
| ], |
| "title": "watchdog: Fix possible use-after-free by calling del_timer_sync()", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2021-47321", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
