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GHSA-W5J4-WM72-F9FP

Vulnerability from github – Published: 2026-06-09 15:32 – Updated: 2026-06-14 06:30

Details

In the Linux kernel, the following vulnerability has been resolved:

dm: fix unlocked test for dm_suspended_md

The function dm_blk_report_zones tests if the device is suspended with the "dm_suspended_md" call. However, this function is called without holding any locks, so the device may be suspended just after it.

Move the call to dm_suspended_md after dm_get_live_table, so that the device can't be suspended after the suspended state was tested.

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-46327"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-09T14:16:42Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm: fix unlocked test for dm_suspended_md\n\nThe function dm_blk_report_zones tests if the device is suspended with\nthe \"dm_suspended_md\" call. However, this function is called without\nholding any locks, so the device may be suspended just after it.\n\nMove the call to dm_suspended_md after dm_get_live_table, so that the\ndevice can\u0027t be suspended after the suspended state was tested.",
  "id": "GHSA-w5j4-wm72-f9fp",
  "modified": "2026-06-14T06:30:24Z",
  "published": "2026-06-09T15:32:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46327"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/175ac0a6115400278d3900f5a04a58b17b3f6cd0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/24c405fdbe215c45e57bba672cc42859038491ee"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7a3385e97af2b6f485fef11e82d8c29adee4be93"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d809a36692ee1394cac85ce6ba7cf8ea58da5812"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-46327 (GCVE-0-2026-46327)

Vulnerability from cvelistv5 – Published: 2026-06-09 12:25 – Updated: 2026-08-05 12:31

Title

dm: fix unlocked test for dm_suspended_md

Summary

In the Linux kernel, the following vulnerability has been resolved: dm: fix unlocked test for dm_suspended_md The function dm_blk_report_zones tests if the device is suspended with the "dm_suspended_md" call. However, this function is called without holding any locks, so the device may be suspended just after it. Move the call to dm_suspended_md after dm_get_live_table, so that the device can't be suspended after the suspended state was tested.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/175ac0a6115400278…
https://git.kernel.org/stable/c/7a3385e97af2b6f48…
https://git.kernel.org/stable/c/d809a36692ee1394c…
https://git.kernel.org/stable/c/24c405fdbe215c45e…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: f9c1bdf24615303d48a2d0fd629c88f3189563aa , < 175ac0a6115400278d3900f5a04a58b17b3f6cd0 (git) Affected: 37f53a2c60d03743e0eacf7a0c01c279776fef4e , < 7a3385e97af2b6f485fef11e82d8c29adee4be93 (git) Affected: 37f53a2c60d03743e0eacf7a0c01c279776fef4e , < d809a36692ee1394cac85ce6ba7cf8ea58da5812 (git) Affected: 37f53a2c60d03743e0eacf7a0c01c279776fef4e , < 24c405fdbe215c45e57bba672cc42859038491ee (git) Affected: d19bc1b4dd5f322980b1f05f79b2ea4f0db10920 (git) Affected: 6.12.34 , < 6.12.75 (semver) Affected: 6.15.3 , < 6.16 (semver)
Linux	Linux	Affected: 6.16 Unaffected: 0 , < 6.16 (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.14 , ≤ 6.18.* (semver) Unaffected: 6.19.4 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/dm-zone.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "175ac0a6115400278d3900f5a04a58b17b3f6cd0",
              "status": "affected",
              "version": "f9c1bdf24615303d48a2d0fd629c88f3189563aa",
              "versionType": "git"
            },
            {
              "lessThan": "7a3385e97af2b6f485fef11e82d8c29adee4be93",
              "status": "affected",
              "version": "37f53a2c60d03743e0eacf7a0c01c279776fef4e",
              "versionType": "git"
            },
            {
              "lessThan": "d809a36692ee1394cac85ce6ba7cf8ea58da5812",
              "status": "affected",
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              "versionType": "git"
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            {
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              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d19bc1b4dd5f322980b1f05f79b2ea4f0db10920",
              "versionType": "git"
            },
            {
              "lessThan": "6.12.75",
              "status": "affected",
              "version": "6.12.34",
              "versionType": "semver"
            },
            {
              "lessThan": "6.16",
              "status": "affected",
              "version": "6.15.3",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/dm-zone.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.75",
                  "versionStartIncluding": "6.12.34",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.14",
                  "versionStartIncluding": "6.16",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
                },
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                }
              ],
              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm: fix unlocked test for dm_suspended_md\n\nThe function dm_blk_report_zones tests if the device is suspended with\nthe \"dm_suspended_md\" call. However, this function is called without\nholding any locks, so the device may be suspended just after it.\n\nMove the call to dm_suspended_md after dm_get_live_table, so that the\ndevice can\u0027t be suspended after the suspended state was tested."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable code is reached only through local block-layer ioctls (BLKREPORTZONE/BLKREPORTZONEV2 via blkdev_report_zones_ioctl) and device-mapper control ioctls that trigger dm_swap_table/dm_revalidate_zones; there is no network-facing entry point.\nAC:L - Exploitation is a TOCTOU race between concurrent BLKREPORTZONE calls and a zoned dm table activation/revalidation; an attacker can control both sides by running parallel threads and retrying until the window is hit, without depending on uncontrollable timing or memory layout.\nPR:L - Triggering dm table load/swap and zone revalidation requires CAP_SYS_ADMIN, which is obtainable by an unprivileged user inside a user namespace (unshare -Urn); BLKREPORTZONE additionally requires read access to the dm block device, which the same attacker can grant when creating the device.\nUI:N - No victim interaction is required once the attacker has the needed privileges and device access; the race can be driven entirely by attacker-controlled ioctl threads during dm-crypt zoned table setup.\nS:U - The use-after-free corrupts kernel heap metadata and zone-write-plug structures within kernel memory; it does not cross a VM, container, or IOMMU security boundary to affect a separate authority.\nC:H - The bug revives the CVE-2025-38141 class use-after-free where disk_free_zone_resources() can free zone_wplugs_hash/zones_cond while dm_blk_report_zones() still reads them through the live table path, enabling disclosure of freed kernel heap contents.\nI:H - Use-after-free on zone write plug and zone-condition structures provides attacker-influencable heap corruption primitives that can be developed into arbitrary kernel memory writes or control-flow hijack, not merely a bounded modification.\nA:H - Concurrent access to freed zone resources during failed blk_revalidate_disk_zones() can cause kernel oops/panic from dereferencing freed zone_wplugs_hash, zones_cond, or related structures, even when full exploitation is not attempted."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:31:22.716Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/175ac0a6115400278d3900f5a04a58b17b3f6cd0"
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        {
          "url": "https://git.kernel.org/stable/c/7a3385e97af2b6f485fef11e82d8c29adee4be93"
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        {
          "url": "https://git.kernel.org/stable/c/d809a36692ee1394cac85ce6ba7cf8ea58da5812"
        },
        {
          "url": "https://git.kernel.org/stable/c/24c405fdbe215c45e57bba672cc42859038491ee"
        }
      ],
      "title": "dm: fix unlocked test for dm_suspended_md",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46327",
    "datePublished": "2026-06-09T12:25:54.781Z",
    "dateReserved": "2026-05-13T15:03:33.112Z",
    "dateUpdated": "2026-08-05T12:31:22.716Z",
    "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.

Detection rules are retrieved from Rulezet.

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-W5J4-WM72-F9FP

CVE-2026-46327 (GCVE-0-2026-46327)

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