{"id":"CVE-2026-99135","state":"PUBLISHED","title":"dm-integrity: fix infinite loop on discard with large tag size","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm-integrity: fix infinite loop on discard with large tag size\n\nWhen integrity_metadata handles a discard, it fills a buffer with\nDISCARD_FILLER and writes it over the tags, max_blocks blocks at a\ntime. If the kmalloc fails, the buffer is the on-stack array\nchecksums_onstack and max_size is set to HASH_MAX_DIGESTSIZE. So if the\ntag size is larger than HASH_MAX_DIGESTSIZE, max_blocks is zero, bi_size\nis never decremented and the loop never terminates.\n\nFix this by using sizeof(checksums_onstack) as max_size. The array has\nMAX_TAG_SIZE bytes since commit b93b6643e9b5 (\"dm integrity: fix a\ncrash with unusually large tag size\"), so max_blocks is at least 1.","publishedAt":"2026-10-28T10:34:47.902Z","updatedAt":"2026-10-30T12:42:08.647Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","status":"affected","lessThan":"f41a224b3c9d66c7b59afc7cae02a8b214f3c684","versionType":"git"},{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","status":"affected","lessThan":"c66f5c6ccfa832d28b44a66c01e3468c246adac4","versionType":"git"},{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","status":"affected","lessThan":"41a18e6c6e2c4a912494a035c17ecfe79c68b9e6","versionType":"git"},{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","status":"affected","lessThan":"bbc154a7da4e075aef720ef051aff6094400eb66","versionType":"git"},{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","status":"affected","lessThan":"c4cba6670fa199415689f67108e96b0ba469d767","versionType":"git"},{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","status":"affected","lessThan":"fc512700f1413fed652dac22fa1c4e837210b9c0","versionType":"git"},{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","status":"affected","lessThan":"251b44b424920df9204e88a81fb3f78fa48ddd99","versionType":"git"},{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","status":"affected","lessThan":"18d80c77b4c7dd20699e81cedfbbff4e9d198f28","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/dm-integrity.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.7","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.161","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.115","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.59","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.13","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/dm-integrity.c"]}],"references":["https://git.kernel.org/stable/c/f41a224b3c9d66c7b59afc7cae02a8b214f3c684","https://git.kernel.org/stable/c/c66f5c6ccfa832d28b44a66c01e3468c246adac4","https://git.kernel.org/stable/c/41a18e6c6e2c4a912494a035c17ecfe79c68b9e6","https://git.kernel.org/stable/c/bbc154a7da4e075aef720ef051aff6094400eb66","https://git.kernel.org/stable/c/c4cba6670fa199415689f67108e96b0ba469d767","https://git.kernel.org/stable/c/fc512700f1413fed652dac22fa1c4e837210b9c0","https://git.kernel.org/stable/c/251b44b424920df9204e88a81fb3f78fa48ddd99","https://git.kernel.org/stable/c/18d80c77b4c7dd20699e81cedfbbff4e9d198f28"],"weaknesses":[],"ingestedAt":"2026-10-30T13:02:04.640Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/99xxx/CVE-2026-99135.json","commit":"cb14bf1b43b0c9f05f7f40eae2246263fd430780","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-99135","state":"PUBLISHED","datePublished":"2026-10-28T10:34:47.902Z","dateUpdated":"2026-10-30T12:42:08.647Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.394Z"},"containers":{"cna":{"title":"dm-integrity: fix infinite loop on discard with large tag size","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm-integrity: fix infinite loop on discard with large tag size\n\nWhen integrity_metadata handles a discard, it fills a buffer with\nDISCARD_FILLER and writes it over the tags, max_blocks blocks at a\ntime. If the kmalloc fails, the buffer is the on-stack array\nchecksums_onstack and max_size is set to HASH_MAX_DIGESTSIZE. So if the\ntag size is larger than HASH_MAX_DIGESTSIZE, max_blocks is zero, bi_size\nis never decremented and the loop never terminates.\n\nFix this by using sizeof(checksums_onstack) as max_size. The array has\nMAX_TAG_SIZE bytes since commit b93b6643e9b5 (\"dm integrity: fix a\ncrash with unusually large tag size\"), so max_blocks is at least 1."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","status":"affected","lessThan":"f41a224b3c9d66c7b59afc7cae02a8b214f3c684","versionType":"git"},{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","status":"affected","lessThan":"c66f5c6ccfa832d28b44a66c01e3468c246adac4","versionType":"git"},{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","status":"affected","lessThan":"41a18e6c6e2c4a912494a035c17ecfe79c68b9e6","versionType":"git"},{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","status":"affected","lessThan":"bbc154a7da4e075aef720ef051aff6094400eb66","versionType":"git"},{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","status":"affected","lessThan":"c4cba6670fa199415689f67108e96b0ba469d767","versionType":"git"},{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","status":"affected","lessThan":"fc512700f1413fed652dac22fa1c4e837210b9c0","versionType":"git"},{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","status":"affected","lessThan":"251b44b424920df9204e88a81fb3f78fa48ddd99","versionType":"git"},{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","status":"affected","lessThan":"18d80c77b4c7dd20699e81cedfbbff4e9d198f28","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/dm-integrity.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.7","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.161","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.115","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.59","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.13","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/dm-integrity.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/f41a224b3c9d66c7b59afc7cae02a8b214f3c684"},{"url":"https://git.kernel.org/stable/c/c66f5c6ccfa832d28b44a66c01e3468c246adac4"},{"url":"https://git.kernel.org/stable/c/41a18e6c6e2c4a912494a035c17ecfe79c68b9e6"},{"url":"https://git.kernel.org/stable/c/bbc154a7da4e075aef720ef051aff6094400eb66"},{"url":"https://git.kernel.org/stable/c/c4cba6670fa199415689f67108e96b0ba469d767"},{"url":"https://git.kernel.org/stable/c/fc512700f1413fed652dac22fa1c4e837210b9c0"},{"url":"https://git.kernel.org/stable/c/251b44b424920df9204e88a81fb3f78fa48ddd99"},{"url":"https://git.kernel.org/stable/c/18d80c77b4c7dd20699e81cedfbbff4e9d198f28"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:42:08.647Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"5.10.273"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"5.15.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.6.161"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.12.115"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.18.59"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"7.2.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}