{"id":"CVE-2021-4460","state":"PUBLISHED","title":"drm/amdkfd: Fix UBSAN shift-out-of-bounds warning","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Fix UBSAN shift-out-of-bounds warning\n\nIf get_num_sdma_queues or get_num_xgmi_sdma_queues is 0, we end up\ndoing a shift operation where the number of bits shifted equals\nnumber of bits in the operand. This behaviour is undefined.\n\nSet num_sdma_queues or num_xgmi_sdma_queues to ULLONG_MAX, if the\ncount is >= number of bits in the operand.\n\nBug: https://gitlab.freedesktop.org/drm/amd/-/issues/1472","publishedAt":"2025-10-01T11:45:19.050Z","updatedAt":"2026-08-11T02:05:07.041Z","severity":{"score":7.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"35cdc81bfa94d10373ecae279f3c48ca858ac4fd","status":"affected","lessThan":"0c0356ef2498c1a250fe3846f30293f828737309","versionType":"git"},{"version":"35cdc81bfa94d10373ecae279f3c48ca858ac4fd","status":"affected","lessThan":"1874b0ef1426b873de94c61861e38f29a8df714c","versionType":"git"},{"version":"35cdc81bfa94d10373ecae279f3c48ca858ac4fd","status":"affected","lessThan":"3fdc5182700910a685d23df57d65166e8556a266","versionType":"git"},{"version":"35cdc81bfa94d10373ecae279f3c48ca858ac4fd","status":"affected","lessThan":"9069b1b542de8f3bbffef868aff41521b21485cf","versionType":"git"},{"version":"35cdc81bfa94d10373ecae279f3c48ca858ac4fd","status":"affected","lessThan":"50e2fc36e72d4ad672032ebf646cecb48656efe0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.4","versionType":"semver"},{"version":"5.4.118","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.36","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.11.20","status":"unaffected","lessThanOrEqual":"5.11.*","versionType":"semver"},{"version":"5.12.3","status":"unaffected","lessThanOrEqual":"5.12.*","versionType":"semver"},{"version":"5.13","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c"]}],"references":["https://git.kernel.org/stable/c/0c0356ef2498c1a250fe3846f30293f828737309","https://git.kernel.org/stable/c/1874b0ef1426b873de94c61861e38f29a8df714c","https://git.kernel.org/stable/c/3fdc5182700910a685d23df57d65166e8556a266","https://git.kernel.org/stable/c/9069b1b542de8f3bbffef868aff41521b21485cf","https://git.kernel.org/stable/c/50e2fc36e72d4ad672032ebf646cecb48656efe0"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-29T19:49:23.890Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/4xxx/CVE-2021-4460.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-4460","state":"PUBLISHED","datePublished":"2025-10-01T11:45:19.050Z","dateUpdated":"2026-08-11T02:05:07.041Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-10-01T11:38:13.842Z"},"containers":{"cna":{"title":"drm/amdkfd: Fix UBSAN shift-out-of-bounds warning","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Fix UBSAN shift-out-of-bounds warning\n\nIf get_num_sdma_queues or get_num_xgmi_sdma_queues is 0, we end up\ndoing a shift operation where the number of bits shifted equals\nnumber of bits in the operand. This behaviour is undefined.\n\nSet num_sdma_queues or num_xgmi_sdma_queues to ULLONG_MAX, if the\ncount is >= number of bits in the operand.\n\nBug: https://gitlab.freedesktop.org/drm/amd/-/issues/1472"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"35cdc81bfa94d10373ecae279f3c48ca858ac4fd","status":"affected","lessThan":"0c0356ef2498c1a250fe3846f30293f828737309","versionType":"git"},{"version":"35cdc81bfa94d10373ecae279f3c48ca858ac4fd","status":"affected","lessThan":"1874b0ef1426b873de94c61861e38f29a8df714c","versionType":"git"},{"version":"35cdc81bfa94d10373ecae279f3c48ca858ac4fd","status":"affected","lessThan":"3fdc5182700910a685d23df57d65166e8556a266","versionType":"git"},{"version":"35cdc81bfa94d10373ecae279f3c48ca858ac4fd","status":"affected","lessThan":"9069b1b542de8f3bbffef868aff41521b21485cf","versionType":"git"},{"version":"35cdc81bfa94d10373ecae279f3c48ca858ac4fd","status":"affected","lessThan":"50e2fc36e72d4ad672032ebf646cecb48656efe0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.4","versionType":"semver"},{"version":"5.4.118","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.36","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.11.20","status":"unaffected","lessThanOrEqual":"5.11.*","versionType":"semver"},{"version":"5.12.3","status":"unaffected","lessThanOrEqual":"5.12.*","versionType":"semver"},{"version":"5.13","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/0c0356ef2498c1a250fe3846f30293f828737309"},{"url":"https://git.kernel.org/stable/c/1874b0ef1426b873de94c61861e38f29a8df714c"},{"url":"https://git.kernel.org/stable/c/3fdc5182700910a685d23df57d65166e8556a266"},{"url":"https://git.kernel.org/stable/c/9069b1b542de8f3bbffef868aff41521b21485cf"},{"url":"https://git.kernel.org/stable/c/50e2fc36e72d4ad672032ebf646cecb48656efe0"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-11T02:05:07.041Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"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"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.1,"attackVector":"LOCAL","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"id":"CVE-2021-4460","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-01-14T17:39:30.831800Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","lang":"en","type":"CWE","description":"CWE-125 Out-of-bounds Read"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-01-14T17:42:45.892Z"}}]}}}