{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2021-46966", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-27T18:42:55.943Z", "datePublished": "2024-02-27T18:47:03.631Z", "dateUpdated": "2026-05-23T15:18:48.670Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-23T15:18:48.670Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: custom_method: fix potential use-after-free issue\n\nIn cm_write(), buf is always freed when reaching the end of the\nfunction. If the requested count is less than table.length, the\nallocated buffer will be freed but subsequent calls to cm_write() will\nstill try to access it.\n\nRemove the unconditional kfree(buf) at the end of the function and\nset the buf to NULL in the -EINVAL error path to match the rest of\nfunction." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/acpi/custom_method.c" ], "versions": [ { "version": "4bda2b79a9d04c8ba31681c66e95877dbb433416", "lessThan": "1d53ca5d131074c925ce38361fb0376d3bf7e394", "status": "affected", "versionType": "git" }, { "version": "5c12dadcbef8cd55ef1f5dac799bfcbb7ea7db1d", "lessThan": "8b04d57f30caf76649d0567551589af9a66ca9be", "status": "affected", "versionType": "git" }, { "version": "35b88a10535edcf62d3e6b7893a8cd506ff98a24", "lessThan": "90575d1d9311b753cf1718f4ce9061ddda7dfd23", "status": "affected", "versionType": "git" }, { "version": "e4467fb6ef547aa352dc03397f9474ec84eced5b", "lessThan": "a5b26a2e362f572d87e9fd35435680e557052a17", "status": "affected", "versionType": "git" }, { "version": "03d1571d9513369c17e6848476763ebbd10ec2cb", "lessThan": "72814a94c38a33239793f7622cec6ace1e540c4b", "status": "affected", "versionType": "git" }, { "version": "03d1571d9513369c17e6848476763ebbd10ec2cb", "lessThan": "62dc2440ebb552aa0d7f635e1697e077d9d21203", "status": "affected", "versionType": "git" }, { "version": "03d1571d9513369c17e6848476763ebbd10ec2cb", "lessThan": "f16737caf41fc06cfe6e49048becb09657074d4b", "status": "affected", "versionType": "git" }, { "version": "03d1571d9513369c17e6848476763ebbd10ec2cb", "lessThan": "b7a5baaae212a686ceb812c32fceed79c03c0234", "status": "affected", "versionType": "git" }, { "version": "03d1571d9513369c17e6848476763ebbd10ec2cb", "lessThan": "e483bb9a991bdae29a0caa4b3a6d002c968f94aa", "status": "affected", "versionType": "git" }, { "version": "70424999fbf1f160ade111cb9baab51776e0f9c2", "status": "affected", "versionType": "git" }, { "version": "06cd4a06eb596a888239fb8ceb6ea15677cab396", "status": "affected", "versionType": "git" }, { "version": "4.4.195", "lessThan": "4.4.269", "status": "affected", "versionType": "semver" }, { "version": "4.9.195", "lessThan": "4.9.269", "status": "affected", "versionType": "semver" }, { "version": "4.14.147", "lessThan": "4.14.233", "status": "affected", "versionType": "semver" }, { "version": "4.19.77", "lessThan": "4.19.191", "status": "affected", "versionType": "semver" }, { "version": "5.2.19", "lessThan": "5.3", "status": "affected", "versionType": "semver" }, { "version": "5.3.4", "lessThan": "5.4", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/acpi/custom_method.c" ], "versions": [ { "version": "5.4", "status": "affected" }, { "version": "0", "lessThan": "5.4", "status": "unaffected", "versionType": "semver" }, { "version": "4.4.269", "lessThanOrEqual": "4.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.9.269", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.233", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.191", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.118", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.36", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.11.20", "lessThanOrEqual": "5.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.12.3", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.13", "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": "4.4.195", "versionEndExcluding": "4.4.269" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9.195", "versionEndExcluding": "4.9.269" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14.147", "versionEndExcluding": "4.14.233" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.77", "versionEndExcluding": "4.19.191" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.4.118" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.10.36" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.11.20" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.12.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2.19" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3.4" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/1d53ca5d131074c925ce38361fb0376d3bf7e394" }, { "url": "https://git.kernel.org/stable/c/8b04d57f30caf76649d0567551589af9a66ca9be" }, { "url": "https://git.kernel.org/stable/c/90575d1d9311b753cf1718f4ce9061ddda7dfd23" }, { "url": "https://git.kernel.org/stable/c/a5b26a2e362f572d87e9fd35435680e557052a17" }, { "url": "https://git.kernel.org/stable/c/72814a94c38a33239793f7622cec6ace1e540c4b" }, { "url": "https://git.kernel.org/stable/c/62dc2440ebb552aa0d7f635e1697e077d9d21203" }, { "url": "https://git.kernel.org/stable/c/f16737caf41fc06cfe6e49048becb09657074d4b" }, { "url": "https://git.kernel.org/stable/c/b7a5baaae212a686ceb812c32fceed79c03c0234" }, { "url": "https://git.kernel.org/stable/c/e483bb9a991bdae29a0caa4b3a6d002c968f94aa" } ], "title": "ACPI: custom_method: fix potential use-after-free issue", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-06-28T17:00:55.492289Z", "id": "CVE-2021-46966", "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": "2024-06-28T17:01:03.694Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:17:42.993Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/1d53ca5d131074c925ce38361fb0376d3bf7e394", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/8b04d57f30caf76649d0567551589af9a66ca9be", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/90575d1d9311b753cf1718f4ce9061ddda7dfd23", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/a5b26a2e362f572d87e9fd35435680e557052a17", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/72814a94c38a33239793f7622cec6ace1e540c4b", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/62dc2440ebb552aa0d7f635e1697e077d9d21203", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/f16737caf41fc06cfe6e49048becb09657074d4b", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/b7a5baaae212a686ceb812c32fceed79c03c0234", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/e483bb9a991bdae29a0caa4b3a6d002c968f94aa", "tags": [ "x_transferred" ] } ] } ] } }