{"dataType":"CVE_RECORD","dataVersion":"5.1","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":"2025-05-04T07:01:54.678Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T07:01:54.678Z"},"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"}}]}}