{"id":"CVE-2026-72100","state":"PUBLISHED","title":"dm-integrity: fix a bug if the bio is out of limits","description":"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.","publishedAt":"2026-08-15T05:52:44.923Z","updatedAt":"2026-10-19T21:19:27.814Z","severity":{"score":8.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"fb0987682c629c1d2c476f35f6fde405a5e304a4","status":"affected","lessThan":"f7989286175f32db8605e767a1a2efc62e894dc8","versionType":"git"},{"version":"fb0987682c629c1d2c476f35f6fde405a5e304a4","status":"affected","lessThan":"aa5113e7155f4ea81d2c0303ab5cb272d4b32627","versionType":"git"},{"version":"fb0987682c629c1d2c476f35f6fde405a5e304a4","status":"affected","lessThan":"3d1afaa074622859678b1a1e7c1b9c0af74c89b0","versionType":"git"},{"version":"fb0987682c629c1d2c476f35f6fde405a5e304a4","status":"affected","lessThan":"5a266764fadaff8b5c1fe37a186ebf9b09cb953e","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":"6.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.11","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","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/f7989286175f32db8605e767a1a2efc62e894dc8","https://git.kernel.org/stable/c/aa5113e7155f4ea81d2c0303ab5cb272d4b32627","https://git.kernel.org/stable/c/3d1afaa074622859678b1a1e7c1b9c0af74c89b0","https://git.kernel.org/stable/c/5a266764fadaff8b5c1fe37a186ebf9b09cb953e"],"weaknesses":["CWE-667"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/72xxx/CVE-2026-72100.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72100","state":"PUBLISHED","datePublished":"2026-08-15T05:52:44.923Z","dateUpdated":"2026-10-19T21:19:27.814Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-09T03:40:39.905Z"},"containers":{"cna":{"title":"dm-integrity: fix a bug if the bio is out of limits","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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"fb0987682c629c1d2c476f35f6fde405a5e304a4","status":"affected","lessThan":"f7989286175f32db8605e767a1a2efc62e894dc8","versionType":"git"},{"version":"fb0987682c629c1d2c476f35f6fde405a5e304a4","status":"affected","lessThan":"aa5113e7155f4ea81d2c0303ab5cb272d4b32627","versionType":"git"},{"version":"fb0987682c629c1d2c476f35f6fde405a5e304a4","status":"affected","lessThan":"3d1afaa074622859678b1a1e7c1b9c0af74c89b0","versionType":"git"},{"version":"fb0987682c629c1d2c476f35f6fde405a5e304a4","status":"affected","lessThan":"5a266764fadaff8b5c1fe37a186ebf9b09cb953e","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":"6.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.11","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","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/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"}],"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."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T05:40:15.688Z"},"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"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-72100","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T15:51:56.986818Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-667","lang":"en","type":"CWE","description":"CWE-667 Improper Locking"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T21:19:27.814Z"}}]}}}