{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2021-47477", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-22T06:20:56.200Z", "datePublished": "2024-05-22T08:19:30.860Z", "dateUpdated": "2026-05-11T13:55:26.662Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T13:55:26.662Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: dt9812: fix DMA buffers on stack\n\nUSB transfer buffers are typically mapped for DMA and must not be\nallocated on the stack or transfers will fail.\n\nAllocate proper transfer buffers in the various command helpers and\nreturn an error on short transfers instead of acting on random stack\ndata.\n\nNote that this also fixes a stack info leak on systems where DMA is not\nused as 32 bytes are always sent to the device regardless of how short\nthe command is." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/comedi/drivers/dt9812.c" ], "versions": [ { "version": "63274cd7d38a3322d90b66a5bc976de1fb899051", "lessThan": "a6af69768d5cb4b2528946d53be5fa19ade37723", "status": "affected", "versionType": "git" }, { "version": "63274cd7d38a3322d90b66a5bc976de1fb899051", "lessThan": "365a346cda82f51d835c49136a00a9df8a78c7f2", "status": "affected", "versionType": "git" }, { "version": "63274cd7d38a3322d90b66a5bc976de1fb899051", "lessThan": "8a52bc480992c7c9da3ebfea456af731f50a4b97", "status": "affected", "versionType": "git" }, { "version": "63274cd7d38a3322d90b66a5bc976de1fb899051", "lessThan": "39ea61037ae78f14fa121228dd962ea3280eacf3", "status": "affected", "versionType": "git" }, { "version": "63274cd7d38a3322d90b66a5bc976de1fb899051", "lessThan": "3efb7af8ac437085b6c776e5b54830b149d86efe", "status": "affected", "versionType": "git" }, { "version": "63274cd7d38a3322d90b66a5bc976de1fb899051", "lessThan": "786f5b03450454557ff858a8bead5d7c0cbf78d6", "status": "affected", "versionType": "git" }, { "version": "63274cd7d38a3322d90b66a5bc976de1fb899051", "lessThan": "3ac273d154d634e2034508a14db82a95d7ad12ed", "status": "affected", "versionType": "git" }, { "version": "63274cd7d38a3322d90b66a5bc976de1fb899051", "lessThan": "20cebb8b620dc987e55ddc46801de986e081757e", "status": "affected", "versionType": "git" }, { "version": "63274cd7d38a3322d90b66a5bc976de1fb899051", "lessThan": "536de747bc48262225889a533db6650731ab25d3", "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/comedi/drivers/dt9812.c" ], "versions": [ { "version": "2.6.29", "status": "affected" }, { "version": "0", "lessThan": "2.6.29", "status": "unaffected", "versionType": "semver" }, { "version": "4.4.292", "lessThanOrEqual": "4.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.9.290", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.255", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.217", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.159", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.79", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.14.18", "lessThanOrEqual": "5.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.2", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.16", "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": "4.4.292" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "4.9.290" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "4.14.255" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "4.19.217" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "5.4.159" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "5.10.79" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "5.14.18" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "5.15.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "5.16" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/a6af69768d5cb4b2528946d53be5fa19ade37723" }, { "url": "https://git.kernel.org/stable/c/365a346cda82f51d835c49136a00a9df8a78c7f2" }, { "url": "https://git.kernel.org/stable/c/8a52bc480992c7c9da3ebfea456af731f50a4b97" }, { "url": "https://git.kernel.org/stable/c/39ea61037ae78f14fa121228dd962ea3280eacf3" }, { "url": "https://git.kernel.org/stable/c/3efb7af8ac437085b6c776e5b54830b149d86efe" }, { "url": "https://git.kernel.org/stable/c/786f5b03450454557ff858a8bead5d7c0cbf78d6" }, { "url": "https://git.kernel.org/stable/c/3ac273d154d634e2034508a14db82a95d7ad12ed" }, { "url": "https://git.kernel.org/stable/c/20cebb8b620dc987e55ddc46801de986e081757e" }, { "url": "https://git.kernel.org/stable/c/536de747bc48262225889a533db6650731ab25d3" } ], "title": "comedi: dt9812: fix DMA buffers on stack", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "problemTypes": [ { "descriptions": [ { "type": "CWE", "lang": "en", "description": "CWE-noinfo Not enough information" } ] } ], "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "timestamp": "2024-05-22T15:50:06.158354Z", "id": "CVE-2021-47477", "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": "2024-11-06T19:35:17.051Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:39:59.539Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/a6af69768d5cb4b2528946d53be5fa19ade37723", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/365a346cda82f51d835c49136a00a9df8a78c7f2", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/8a52bc480992c7c9da3ebfea456af731f50a4b97", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/39ea61037ae78f14fa121228dd962ea3280eacf3", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/3efb7af8ac437085b6c776e5b54830b149d86efe", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/786f5b03450454557ff858a8bead5d7c0cbf78d6", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/3ac273d154d634e2034508a14db82a95d7ad12ed", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/20cebb8b620dc987e55ddc46801de986e081757e", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/536de747bc48262225889a533db6650731ab25d3", "tags": [ "x_transferred" ] } ] } ] } }