{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2021-47356", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-21T14:28:16.987Z", "datePublished": "2024-05-21T14:35:59.097Z", "dateUpdated": "2026-05-11T13:53:07.476Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T13:53:07.476Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmISDN: fix possible use-after-free in HFC_cleanup()\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/isdn/hardware/mISDN/hfcpci.c" ], "versions": [ { "version": "87c5fa1bb42624254a2013cbbc3b170d6017f5d6", "lessThan": "49331c07ef0f8fdfa42b30ba6a83a657b29d7fbe", "status": "affected", "versionType": "git" }, { "version": "87c5fa1bb42624254a2013cbbc3b170d6017f5d6", "lessThan": "54ff3202928952a100c477248e65ac6db01258a7", "status": "affected", "versionType": "git" }, { "version": "87c5fa1bb42624254a2013cbbc3b170d6017f5d6", "lessThan": "7867ddc5f3de7f289aee63233afc0df4b62834c5", "status": "affected", "versionType": "git" }, { "version": "87c5fa1bb42624254a2013cbbc3b170d6017f5d6", "lessThan": "5f2818185da0fe82a932f0856633038b66faf124", "status": "affected", "versionType": "git" }, { "version": "87c5fa1bb42624254a2013cbbc3b170d6017f5d6", "lessThan": "3ecd228c636ee17c14662729737fa07242a93cb0", "status": "affected", "versionType": "git" }, { "version": "87c5fa1bb42624254a2013cbbc3b170d6017f5d6", "lessThan": "b7ee9ae1e0cf55a037c4a99af2acc5d78cb7802d", "status": "affected", "versionType": "git" }, { "version": "87c5fa1bb42624254a2013cbbc3b170d6017f5d6", "lessThan": "61370ff07e0acc657559a8fac02551dfeb9d3020", "status": "affected", "versionType": "git" }, { "version": "87c5fa1bb42624254a2013cbbc3b170d6017f5d6", "lessThan": "ed7c3739d0a07e2ec3ccbffe7e93cea01c438cda", "status": "affected", "versionType": "git" }, { "version": "87c5fa1bb42624254a2013cbbc3b170d6017f5d6", "lessThan": "009fc857c5f6fda81f2f7dd851b2d54193a8e733", "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/isdn/hardware/mISDN/hfcpci.c" ], "versions": [ { "version": "2.6.29", "status": "affected" }, { "version": "0", "lessThan": "2.6.29", "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": "5.4.133", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.51", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.12.18", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.13.3", "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": "2.6.29", "versionEndExcluding": "4.4.276" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "4.9.276" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "4.14.240" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "4.19.198" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "5.4.133" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "5.10.51" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "5.12.18" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "5.13.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "5.14" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/49331c07ef0f8fdfa42b30ba6a83a657b29d7fbe" }, { "url": "https://git.kernel.org/stable/c/54ff3202928952a100c477248e65ac6db01258a7" }, { "url": "https://git.kernel.org/stable/c/7867ddc5f3de7f289aee63233afc0df4b62834c5" }, { "url": "https://git.kernel.org/stable/c/5f2818185da0fe82a932f0856633038b66faf124" }, { "url": "https://git.kernel.org/stable/c/3ecd228c636ee17c14662729737fa07242a93cb0" }, { "url": "https://git.kernel.org/stable/c/b7ee9ae1e0cf55a037c4a99af2acc5d78cb7802d" }, { "url": "https://git.kernel.org/stable/c/61370ff07e0acc657559a8fac02551dfeb9d3020" }, { "url": "https://git.kernel.org/stable/c/ed7c3739d0a07e2ec3ccbffe7e93cea01c438cda" }, { "url": "https://git.kernel.org/stable/c/009fc857c5f6fda81f2f7dd851b2d54193a8e733" } ], "title": "mISDN: fix possible use-after-free in HFC_cleanup()", "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": "unknown", "versions": [ { "version": "1da177e4c3f4", "status": "affected", "lessThan": "49331c07ef0f", "versionType": "custom" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "1da177e4c3f4", "status": "affected", "lessThan": "54ff32029289", "versionType": "custom" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "1da177e4c3f4", "status": "affected", "lessThan": "7867ddc5f3de", "versionType": "custom" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "1da177e4c3f4", "status": "affected", "lessThan": "5f2818185da0", "versionType": "custom" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "1da177e4c3f4", "status": "affected", "lessThan": "3ecd228c636e", "versionType": "custom" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "1da177e4c3f4", "status": "affected", "lessThan": "b7ee9ae1e0cf", "versionType": "custom" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "1da177e4c3f4", "status": "affected", "lessThan": "61370ff07e0a", "versionType": "custom" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "1da177e4c3f4", "status": "affected", "lessThan": "ed7c3739d0a0", "versionType": "custom" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "1da177e4c3f4", "status": "affected", "lessThan": "009fc857c5f6", "versionType": "custom" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "4.4.276", "status": "unaffected", "lessThanOrEqual": "4.4.*", "versionType": "custom" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "4.9.276", "status": "unaffected", "lessThanOrEqual": "4.9.*", "versionType": "custom" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "4.14.240", "status": "unaffected", "lessThanOrEqual": "4.14.*", "versionType": "custom" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "4.19.198", "status": "unaffected", "lessThanOrEqual": "4.19.*", "versionType": "custom" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "5.4.133", "status": "unaffected", "lessThanOrEqual": "5.4.*", "versionType": "custom" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "5.10.51", "status": "unaffected", "lessThanOrEqual": "5.10.*", "versionType": "custom" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "5.12.18", "status": "unaffected", "lessThanOrEqual": "5.12.*", "versionType": "custom" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "5.13.3", "status": "unaffected", "lessThanOrEqual": "5.13.*", "versionType": "custom" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "5.14", "status": "unaffected" } ] } ], "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.7, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "timestamp": "2025-01-16T21:04:48.759363Z", "id": "CVE-2021-47356", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-01-16T21:05:18.885Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:32:08.504Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/49331c07ef0f8fdfa42b30ba6a83a657b29d7fbe", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/54ff3202928952a100c477248e65ac6db01258a7", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/7867ddc5f3de7f289aee63233afc0df4b62834c5", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/5f2818185da0fe82a932f0856633038b66faf124", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/3ecd228c636ee17c14662729737fa07242a93cb0", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/b7ee9ae1e0cf55a037c4a99af2acc5d78cb7802d", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/61370ff07e0acc657559a8fac02551dfeb9d3020", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/ed7c3739d0a07e2ec3ccbffe7e93cea01c438cda", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/009fc857c5f6fda81f2f7dd851b2d54193a8e733", "tags": [ "x_transferred" ] } ] } ] } }