{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89568","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-11T19:38:34.726Z","datePublished":"2026-09-11T19:44:38.078Z","dateUpdated":"2026-09-11T19:44:38.078Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-11T19:44:38.078Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nkho: fix size calculation in kho_preserved_memory_reserve()\n\nkho_preserved_memory_reserve() calculates the size of a preservation by\ndoing 1 << (order + PAGE_SHIFT). Since the '1' is a 32-bit integer, it\ncan only be shifted by 31. That is, it will only work for preservations\nup to 2 GiB. Larger preservations will trigger undefined behaviour.\n\nWhile preservations larger than 2 GiB can't be obtained via folios\ncurrently, they can be obtained via kho_preserve_pages().\n\nFor example, memblock reserve_mem uses kho_preserve_pages().\nReservations larger than 2 GiB are valid and will trigger this bug if\nproperly aligned.\n\nFix it by using 1UL for shifting."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/liveupdate/kexec_handover.c"],"versions":[{"version":"fc33e4b44b2717feba2f6f07ce7943a96499c9ec","lessThan":"42a6f03cf352eb6e6dbeef95e75e686f4cdb9bd1","status":"affected","versionType":"git"},{"version":"fc33e4b44b2717feba2f6f07ce7943a96499c9ec","lessThan":"3a0b8fa2eb36afc88b62a95f33f0c77c71fa5ded","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/liveupdate/kexec_handover.c"],"versions":[{"version":"6.16","status":"affected"},{"version":"0","lessThan":"6.16","status":"unaffected","versionType":"semver"},{"version":"7.2.4","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc1","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":"6.16","versionEndExcluding":"7.2.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"7.3-rc1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/42a6f03cf352eb6e6dbeef95e75e686f4cdb9bd1"},{"url":"https://git.kernel.org/stable/c/3a0b8fa2eb36afc88b62a95f33f0c77c71fa5ded"}],"title":"kho: fix size calculation in kho_preserved_memory_reserve()","x_generator":{"engine":"bippy-1.2.0"}}}}