{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72099","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-08-09T03:40:39.905Z","datePublished":"2026-08-15T05:52:44.292Z","dateUpdated":"2026-08-23T12:46:49.483Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-23T12:46:49.483Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm-integrity: don't increment hash_offset twice\n\nhash_offset is already incremented in the loop \"for (i = 0; i < to_copy;\ni++, ts--)\". Do not increment it again."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L","baseScore":7.1,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:N - The flaw is reached via block I/O on dm-integrity journal/bitmap targets; in enterprise/cloud deployments those volumes are commonly accessed remotely through NFS/ksmbd file exports or iSCSI/NVMe-oF/NBD block protocols, letting a remote client drive the vulnerable TAG_CMP path.\nAC:L - An attacker with read access can reliably trigger TAG_CMP by issuing ordinary multi-sector reads; when metadata tag comparisons span dm-bufio buffer boundaries the double-incremented hash_offset mispredicts tag boundaries without races or uncontrollable layout.\nPR:L - Table creation needs CAP_SYS_ADMIN (obtainable in a user namespace), but exploitation only requires read/write access to the mapped block device or an exported filesystem backed by it, not init-namespace root.\nUI:N - Exploitation requires only attacker-initiated reads or writes against the dm-integrity-backed storage; no additional victim actions such as mounting a filesystem or opening files beyond the attacker's own I/O are needed.\nS:U - Impact is incorrect integrity-tag verification within the host kernel's device-mapper layer, enabling undetected data tampering or spurious verification failures on the same host; it does not cross VM, container, or IOMMU security boundaries.\nC:N - The bug corrupts tag-boundary state during comparison but does not cause kernel memory disclosure, out-of-bounds reads, or use-after-free; any wrong data returned is attacker-supplied disk content, not leakage of unrelated kernel or user secrets.\nI:H - Misaligned hash_offset can accept integrity tags that should fail verification (including mixed hash/discard-filler boundaries), defeating dm-integrity's tamper detection and allowing undetected modification of protected block data.\nA:L - The same logic error can spuriously fail checksum verification on legitimate reads, returning I/O errors and denying access to protected data without kernel panic, though repeated reads can sustain a denial-of-service against the volume."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/dm-integrity.c"],"versions":[{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","lessThan":"c66b1781a54984227e94b862be9328d81d81e51c","status":"affected","versionType":"git"},{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","lessThan":"39697e2759ac23e65361fe61482f8174cad8a752","status":"affected","versionType":"git"},{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","lessThan":"e6646f4d711d74930d39cce6fb7bfcae4cbee5fd","status":"affected","versionType":"git"},{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","lessThan":"cf9feed8c131e303ecf2afebe6f791be018818ad","status":"affected","versionType":"git"},{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","lessThan":"4f4e43337e9ef322595201cfc24def50fd624219","status":"affected","versionType":"git"},{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","lessThan":"5dfd8042635278613da3b88553e25ade2103cd58","status":"affected","versionType":"git"},{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","lessThan":"829476c06496aab018f14127c055adb164d1a750","status":"affected","versionType":"git"},{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","lessThan":"edf025f083854f80032b73a1aad69a3c90db236f","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/dm-integrity.c"],"versions":[{"version":"5.7","status":"affected"},{"version":"0","lessThan":"5.7","status":"unaffected","versionType":"semver"},{"version":"5.10.266","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.217","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.184","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.145","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.97","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.40","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.1.5","lessThanOrEqual":"7.1.*","status":"unaffected","versionType":"semver"},{"version":"7.2","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":"5.7","versionEndExcluding":"5.10.266"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"5.15.217"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.1.184"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"7.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/c66b1781a54984227e94b862be9328d81d81e51c"},{"url":"https://git.kernel.org/stable/c/39697e2759ac23e65361fe61482f8174cad8a752"},{"url":"https://git.kernel.org/stable/c/e6646f4d711d74930d39cce6fb7bfcae4cbee5fd"},{"url":"https://git.kernel.org/stable/c/cf9feed8c131e303ecf2afebe6f791be018818ad"},{"url":"https://git.kernel.org/stable/c/4f4e43337e9ef322595201cfc24def50fd624219"},{"url":"https://git.kernel.org/stable/c/5dfd8042635278613da3b88553e25ade2103cd58"},{"url":"https://git.kernel.org/stable/c/829476c06496aab018f14127c055adb164d1a750"},{"url":"https://git.kernel.org/stable/c/edf025f083854f80032b73a1aad69a3c90db236f"}],"title":"dm-integrity: don't increment hash_offset twice","x_generator":{"engine":"bippy-1.2.0"}}}}