{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72100","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-08-09T03:40:39.905Z","datePublished":"2026-08-15T05:52:44.923Z","dateUpdated":"2026-08-17T05:40:15.688Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-17T05:40:15.688Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm-integrity: fix a bug if the bio is out of limits\n\nIf dm_integrity_check_limits fails, the code would exit with\nDM_MAPIO_KILL. However, the range would be already locked at this point,\nand it wouldn't be unlocked, resulting in a deadlock. Let's move the\nlimit check up, so that when it exits, no resources are leaked."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:N - The bug is hit in dm_integrity_map_inline() on block I/O to dm-integrity inline volumes; in enterprise/cloud deployments those volumes are commonly exported over network block protocols (iSCSI, NVMe-oF, NBD), letting a remote initiator drive the vulnerable map path.\nAC:L - During SB_FLAG_RECALCULATING the attacker can reliably issue concurrent I/O ahead of the recalc cursor that fails dm_integrity_check_limits (e.g., block-aligned totals with misaligned bvecs), acquiring integrity_range_locked before DM_MAPIO_KILL without cleanup.\nPR:L - Exploitation requires submitting crafted block I/O to the dm-integrity device—available to unprivileged users with device access (disk group), CAP_SYS_ADMIN in a user namespace that can create dm targets, or authenticated remote block-storage clients—not fully unauthenticated network access.\nUI:N - Triggering the flaw needs only attacker-initiated block I/O during recalculation; no victim interaction such as opening files or mounting filesystems is required.\nS:U - Impact is kernel heap corruption, deadlock, and privilege escalation within the host kernel security domain; it does not cross a VM/hypervisor or IOMMU boundary.\nC:H - On DM_MAPIO_KILL the dm core frees the bio/per-io dm_integrity_io while dio->range remains in ic->in_progress, creating a use-after-free that can be leveraged for arbitrary kernel memory disclosure via subsequent tree walks.\nI:H - The dangling dm_integrity_range node in the red-black tree enables heap metadata corruption and attacker-controlled reuse of freed dm_integrity_io memory, supporting arbitrary kernel write and local privilege escalation.\nA:H - The leaked range lock permanently blocks overlapping I/O (uninterruptible waits/deadlock), and UAF on in_progress tree operations can cause kernel oops/panic, producing severe and persistent loss of availability."}]}],"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":"fb0987682c629c1d2c476f35f6fde405a5e304a4","lessThan":"f7989286175f32db8605e767a1a2efc62e894dc8","status":"affected","versionType":"git"},{"version":"fb0987682c629c1d2c476f35f6fde405a5e304a4","lessThan":"aa5113e7155f4ea81d2c0303ab5cb272d4b32627","status":"affected","versionType":"git"},{"version":"fb0987682c629c1d2c476f35f6fde405a5e304a4","lessThan":"3d1afaa074622859678b1a1e7c1b9c0af74c89b0","status":"affected","versionType":"git"},{"version":"fb0987682c629c1d2c476f35f6fde405a5e304a4","lessThan":"5a266764fadaff8b5c1fe37a186ebf9b09cb953e","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":"6.11","status":"affected"},{"version":"0","lessThan":"6.11","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":"6.11","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"7.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/f7989286175f32db8605e767a1a2efc62e894dc8"},{"url":"https://git.kernel.org/stable/c/aa5113e7155f4ea81d2c0303ab5cb272d4b32627"},{"url":"https://git.kernel.org/stable/c/3d1afaa074622859678b1a1e7c1b9c0af74c89b0"},{"url":"https://git.kernel.org/stable/c/5a266764fadaff8b5c1fe37a186ebf9b09cb953e"}],"title":"dm-integrity: fix a bug if the bio is out of limits","x_generator":{"engine":"bippy-1.2.0"}}}}