{"id":"CVE-2026-72169","state":"PUBLISHED","title":"kho: make sure scratch size is always aligned by CMA_MIN_ALIGNMENT_BYTES","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nkho: make sure scratch size is always aligned by CMA_MIN_ALIGNMENT_BYTES\n\nWhen using scratch_scale, the scratch sizes are rounded up to\nCMA_MIN_ALIGNMENT_BYTES since they will be released as MIGRATE_CMA. This\nis not done when using fixed scratch sizes via command line. This can\nresult in user specifying a size which is not aligned, and thus kernel\nreleasing a pageblock that is only partially scratch.\n\nDo the rounding up for both cases in scratch_size_update().","publishedAt":"2026-08-15T05:53:35.599Z","updatedAt":"2026-08-17T05:09:30.900Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3dc92c311498c4d307cfdd0c6c3ac9355b50f683","status":"affected","lessThan":"b8271be34bce151597da5b5179e0648c281322a4","versionType":"git"},{"version":"3dc92c311498c4d307cfdd0c6c3ac9355b50f683","status":"affected","lessThan":"9fefab759f59bf891bef7be15aee4bc7caec7ec3","versionType":"git"},{"version":"3dc92c311498c4d307cfdd0c6c3ac9355b50f683","status":"affected","lessThan":"0e39380a7316122e1b00012b3f3cd3e318b3e7d3","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/liveupdate/kexec_handover.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.16","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/liveupdate/kexec_handover.c"]}],"references":["https://git.kernel.org/stable/c/b8271be34bce151597da5b5179e0648c281322a4","https://git.kernel.org/stable/c/9fefab759f59bf891bef7be15aee4bc7caec7ec3","https://git.kernel.org/stable/c/0e39380a7316122e1b00012b3f3cd3e318b3e7d3"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/72xxx/CVE-2026-72169.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72169","state":"PUBLISHED","datePublished":"2026-08-15T05:53:35.599Z","dateUpdated":"2026-08-17T05:09:30.900Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-09T03:40:39.910Z"},"containers":{"cna":{"title":"kho: make sure scratch size is always aligned by CMA_MIN_ALIGNMENT_BYTES","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nkho: make sure scratch size is always aligned by CMA_MIN_ALIGNMENT_BYTES\n\nWhen using scratch_scale, the scratch sizes are rounded up to\nCMA_MIN_ALIGNMENT_BYTES since they will be released as MIGRATE_CMA. This\nis not done when using fixed scratch sizes via command line. This can\nresult in user specifying a size which is not aligned, and thus kernel\nreleasing a pageblock that is only partially scratch.\n\nDo the rounding up for both cases in scratch_size_update()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3dc92c311498c4d307cfdd0c6c3ac9355b50f683","status":"affected","lessThan":"b8271be34bce151597da5b5179e0648c281322a4","versionType":"git"},{"version":"3dc92c311498c4d307cfdd0c6c3ac9355b50f683","status":"affected","lessThan":"9fefab759f59bf891bef7be15aee4bc7caec7ec3","versionType":"git"},{"version":"3dc92c311498c4d307cfdd0c6c3ac9355b50f683","status":"affected","lessThan":"0e39380a7316122e1b00012b3f3cd3e318b3e7d3","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/liveupdate/kexec_handover.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.16","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/liveupdate/kexec_handover.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/b8271be34bce151597da5b5179e0648c281322a4"},{"url":"https://git.kernel.org/stable/c/9fefab759f59bf891bef7be15aee4bc7caec7ec3"},{"url":"https://git.kernel.org/stable/c/0e39380a7316122e1b00012b3f3cd3e318b3e7d3"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T05:09:30.900Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"6.18.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}