{"id":"CVE-2026-45953","state":"PUBLISHED","title":"md/raid5: fix IO hang with degraded array with llbitmap","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid5: fix IO hang with degraded array with llbitmap\n\nWhen llbitmap bit state is still unwritten, any new write should force\nrcw, as bitmap_ops->blocks_synced() is checked in handle_stripe_dirtying().\nHowever, later the same check is missing in need_this_block(), causing\nstripe to deadloop during handling because handle_stripe() will decide\nto go to handle_stripe_fill(), meanwhile need_this_block() always return\n0 and nothing is handled.","publishedAt":"2026-05-27T12:18:09.203Z","updatedAt":"2026-05-27T12:18:09.203Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5ab829f1971dc99f2aac10846c378e67fc875abc","status":"affected","lessThan":"870b9f15867b0e70f3459ef3974b043e8b229690","versionType":"git"},{"version":"5ab829f1971dc99f2aac10846c378e67fc875abc","status":"affected","lessThan":"28ef299e7a5b81817f8ca8297c2ddff28f5da5e8","versionType":"git"},{"version":"5ab829f1971dc99f2aac10846c378e67fc875abc","status":"affected","lessThan":"cd1635d844d26471c56c0a432abdee12fc9ad735","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/raid5.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.18","versionType":"semver"},{"version":"6.18.14","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.4","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/raid5.c"]}],"references":["https://git.kernel.org/stable/c/870b9f15867b0e70f3459ef3974b043e8b229690","https://git.kernel.org/stable/c/28ef299e7a5b81817f8ca8297c2ddff28f5da5e8","https://git.kernel.org/stable/c/cd1635d844d26471c56c0a432abdee12fc9ad735"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/45xxx/CVE-2026-45953.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-45953","state":"PUBLISHED","datePublished":"2026-05-27T12:18:09.203Z","dateUpdated":"2026-05-27T12:18:09.203Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.088Z"},"containers":{"cna":{"title":"md/raid5: fix IO hang with degraded array with llbitmap","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid5: fix IO hang with degraded array with llbitmap\n\nWhen llbitmap bit state is still unwritten, any new write should force\nrcw, as bitmap_ops->blocks_synced() is checked in handle_stripe_dirtying().\nHowever, later the same check is missing in need_this_block(), causing\nstripe to deadloop during handling because handle_stripe() will decide\nto go to handle_stripe_fill(), meanwhile need_this_block() always return\n0 and nothing is handled."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5ab829f1971dc99f2aac10846c378e67fc875abc","status":"affected","lessThan":"870b9f15867b0e70f3459ef3974b043e8b229690","versionType":"git"},{"version":"5ab829f1971dc99f2aac10846c378e67fc875abc","status":"affected","lessThan":"28ef299e7a5b81817f8ca8297c2ddff28f5da5e8","versionType":"git"},{"version":"5ab829f1971dc99f2aac10846c378e67fc875abc","status":"affected","lessThan":"cd1635d844d26471c56c0a432abdee12fc9ad735","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/raid5.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.18","versionType":"semver"},{"version":"6.18.14","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.4","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/raid5.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/870b9f15867b0e70f3459ef3974b043e8b229690"},{"url":"https://git.kernel.org/stable/c/28ef299e7a5b81817f8ca8297c2ddff28f5da5e8"},{"url":"https://git.kernel.org/stable/c/cd1635d844d26471c56c0a432abdee12fc9ad735"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-27T12:18:09.203Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"6.18.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"6.19.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}