Vulnerability-Lookup

GHSA-3R62-W556-W3C9

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-17 06:33

Details

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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72100"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:21:24Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-3r62-w556-w3c9",
  "modified": "2026-08-17T06:33:09Z",
  "published": "2026-08-15T06:32:12Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72100"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3d1afaa074622859678b1a1e7c1b9c0af74c89b0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5a266764fadaff8b5c1fe37a186ebf9b09cb953e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aa5113e7155f4ea81d2c0303ab5cb272d4b32627"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f7989286175f32db8605e767a1a2efc62e894dc8"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-08-15 05:52 – Updated: 2026-08-17 05:40

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

Linux mitre root Scorecard

References

4 references

URL	Tags
https://git.kernel.org/stable/c/f7989286175f32db8…
https://git.kernel.org/stable/c/aa5113e7155f4ea81…
https://git.kernel.org/stable/c/3d1afaa0746228596…
https://git.kernel.org/stable/c/5a266764fadaff8b5…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: fb0987682c629c1d2c476f35f6fde405a5e304a4 , < f7989286175f32db8605e767a1a2efc62e894dc8 (git) Affected: fb0987682c629c1d2c476f35f6fde405a5e304a4 , < aa5113e7155f4ea81d2c0303ab5cb272d4b32627 (git) Affected: fb0987682c629c1d2c476f35f6fde405a5e304a4 , < 3d1afaa074622859678b1a1e7c1b9c0af74c89b0 (git) Affected: fb0987682c629c1d2c476f35f6fde405a5e304a4 , < 5a266764fadaff8b5c1fe37a186ebf9b09cb953e (git)
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"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f7989286175f32db8605e767a1a2efc62e894dc8",
              "status": "affected",
              "version": "fb0987682c629c1d2c476f35f6fde405a5e304a4",
              "versionType": "git"
            },
            {
              "lessThan": "aa5113e7155f4ea81d2c0303ab5cb272d4b32627",
              "status": "affected",
              "version": "fb0987682c629c1d2c476f35f6fde405a5e304a4",
              "versionType": "git"
            },
            {
              "lessThan": "3d1afaa074622859678b1a1e7c1b9c0af74c89b0",
              "status": "affected",
              "version": "fb0987682c629c1d2c476f35f6fde405a5e304a4",
              "versionType": "git"
            },
            {
              "lessThan": "5a266764fadaff8b5c1fe37a186ebf9b09cb953e",
              "status": "affected",
              "version": "fb0987682c629c1d2c476f35f6fde405a5e304a4",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/dm-integrity.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
            {
              "lessThan": "6.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.97",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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\u0027t be unlocked, resulting in a deadlock. Let\u0027s move the\nlimit check up, so that when it exits, no resources are leaked."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "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": [
            {
              "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": [
        {
          "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"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "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"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-3R62-W556-W3C9

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

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