{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2021-46993", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-27T18:42:55.949Z", "datePublished": "2024-02-28T08:13:18.494Z", "dateUpdated": "2026-05-11T13:45:52.911Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T13:45:52.911Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched: Fix out-of-bound access in uclamp\n\nUtil-clamp places tasks in different buckets based on their clamp values\nfor performance reasons. However, the size of buckets is currently\ncomputed using a rounding division, which can lead to an off-by-one\nerror in some configurations.\n\nFor instance, with 20 buckets, the bucket size will be 1024/20=51. A\ntask with a clamp of 1024 will be mapped to bucket id 1024/51=20. Sadly,\ncorrect indexes are in range [0,19], hence leading to an out of bound\nmemory access.\n\nClamp the bucket id to fix the issue." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/sched/core.c" ], "versions": [ { "version": "69842cba9ace84849bb9b8edcdf2cefccd97901c", "lessThan": "687f523c134b7f0bd040ee1230f6d17990d54172", "status": "affected", "versionType": "git" }, { "version": "69842cba9ace84849bb9b8edcdf2cefccd97901c", "lessThan": "f7347c85490b92dd144fa1fba9e1eca501656ab3", "status": "affected", "versionType": "git" }, { "version": "69842cba9ace84849bb9b8edcdf2cefccd97901c", "lessThan": "3da3f804b82a0a382d523a21acf4cf3bb35f936d", "status": "affected", "versionType": "git" }, { "version": "69842cba9ace84849bb9b8edcdf2cefccd97901c", "lessThan": "42ee47c7e3569d9a0e2cb5053c496d97d380472f", "status": "affected", "versionType": "git" }, { "version": "69842cba9ace84849bb9b8edcdf2cefccd97901c", "lessThan": "6d2f8909a5fabb73fe2a63918117943986c39b6c", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/sched/core.c" ], "versions": [ { "version": "5.3", "status": "affected" }, { "version": "0", "lessThan": "5.3", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.120", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.38", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.11.22", "lessThanOrEqual": "5.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.12.5", "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": "5.3", "versionEndExcluding": "5.4.120" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "5.10.38" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "5.11.22" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "5.12.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "5.13" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/687f523c134b7f0bd040ee1230f6d17990d54172" }, { "url": "https://git.kernel.org/stable/c/f7347c85490b92dd144fa1fba9e1eca501656ab3" }, { "url": "https://git.kernel.org/stable/c/3da3f804b82a0a382d523a21acf4cf3bb35f936d" }, { "url": "https://git.kernel.org/stable/c/42ee47c7e3569d9a0e2cb5053c496d97d380472f" }, { "url": "https://git.kernel.org/stable/c/6d2f8909a5fabb73fe2a63918117943986c39b6c" } ], "title": "sched: Fix out-of-bound access in uclamp", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:24:37.912Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/687f523c134b7f0bd040ee1230f6d17990d54172", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/f7347c85490b92dd144fa1fba9e1eca501656ab3", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/3da3f804b82a0a382d523a21acf4cf3bb35f936d", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/42ee47c7e3569d9a0e2cb5053c496d97d380472f", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/6d2f8909a5fabb73fe2a63918117943986c39b6c", "tags": [ "x_transferred" ] } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2021-46993", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T16:01:01.662746Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:38.812Z" } } ] } }