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CVE-2026-72100 (GCVE-0-2026-72100)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:52 – Updated: 2026-08-17 05:40
VLAI
Title
dm-integrity: fix a bug if the bio is out of limits
Summary
In the Linux kernel, the following vulnerability has been resolved: dm-integrity: fix a bug if the bio is out of limits If dm_integrity_check_limits fails, the code would exit with DM_MAPIO_KILL. However, the range would be already locked at this point, and it wouldn't be unlocked, resulting in a deadlock. Let's move the limit check up, so that when it exits, no resources are leaked.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: fb0987682c629c1d2c476f35f6fde405a5e304a4 , < f7989286175f32db8605e767a1a2efc62e894dc8 (git)
Affected: fb0987682c629c1d2c476f35f6fde405a5e304a4 , < aa5113e7155f4ea81d2c0303ab5cb272d4b32627 (git)
Affected: fb0987682c629c1d2c476f35f6fde405a5e304a4 , < 3d1afaa074622859678b1a1e7c1b9c0af74c89b0 (git)
Affected: fb0987682c629c1d2c476f35f6fde405a5e304a4 , < 5a266764fadaff8b5c1fe37a186ebf9b09cb953e (git)
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Linux Linux Affected: 6.11
Unaffected: 0 , < 6.11 (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/dm-integrity.c"
          ],
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              "status": "affected",
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              "operator": "OR"
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          "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\u0027t be unlocked, resulting in a deadlock. Let\u0027s move the\nlimit check up, so that when it exits, no resources are leaked."
        }
      ],
      "metrics": [
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          "cvssV3_1": {
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
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              "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\u2014available 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\u2014not 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-\u003erange remains in ic-\u003ein_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": {
        "dateUpdated": "2026-08-17T05:40:15.688Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/f7989286175f32db8605e767a1a2efc62e894dc8"
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        },
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      "title": "dm-integrity: fix a bug if the bio is out of limits",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72100",
    "datePublished": "2026-08-15T05:52:44.923Z",
    "dateReserved": "2026-08-09T03:40:39.905Z",
    "dateUpdated": "2026-08-17T05:40:15.688Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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      "epss": "0.00561",
      "percentile": "0.45196"
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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-19T05:26:01+00:00",
      "cve": "CVE-2026-72100",
      "id": "CVE-2026-72100",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: dm-integrity: fix a bug if the bio is out of limits",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72100.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-15T01:29:50Z",
      "cve": "CVE-2026-72100",
      "id": "CVE-2026-72100",
      "initial_release_date": "2026-08-28T16:40:50Z",
      "product_status:known_affected": "29",
      "product_status:known_not_affected": "333",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-72100",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-72100.json",
      "version": "4"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.