Vulnerability-Lookup

GHSA-8HQQ-JF47-JQRX

Vulnerability from github – Published: 2026-08-10 15:33 – Updated: 2026-08-10 15:33

Details

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

mtd: virt_concat: fix use-after-free in mtd_virt_concat_destroy()

mtd_concat_destroy() frees item->concat so calling mtd_virt_concat_put_mtd_devices(item->concat) after that leads to a use-after-free.

Fix it by moving mtd_virt_concat_put_mtd_devices() before mtd_concat_destroy().

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-68423"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-10T13:20:36Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: virt_concat: fix use-after-free in mtd_virt_concat_destroy()\n\nmtd_concat_destroy() frees item-\u003econcat so calling\nmtd_virt_concat_put_mtd_devices(item-\u003econcat) after that leads to a\nuse-after-free.\n\nFix it by moving mtd_virt_concat_put_mtd_devices() before\nmtd_concat_destroy().",
  "id": "GHSA-8hqq-jf47-jqrx",
  "modified": "2026-08-10T15:33:50Z",
  "published": "2026-08-10T15:33:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68423"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4b45d7836b9526b8776af5f29219615be9417230"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d36520e5da8bf87265b334def0daaadf3603cc62"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-68423 (GCVE-0-2026-68423)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:04 – Updated: 2026-08-17 05:05

Title

mtd: virt_concat: fix use-after-free in mtd_virt_concat_destroy()

Summary

In the Linux kernel, the following vulnerability has been resolved: mtd: virt_concat: fix use-after-free in mtd_virt_concat_destroy() mtd_concat_destroy() frees item->concat so calling mtd_virt_concat_put_mtd_devices(item->concat) after that leads to a use-after-free. Fix it by moving mtd_virt_concat_put_mtd_devices() before mtd_concat_destroy().

Severity

No CVSS data available.

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/d36520e5da8bf8726…
https://git.kernel.org/stable/c/4b45d7836b9526b87…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 43db6366fc2de02050e66389f5628d3fdc9af10a , < d36520e5da8bf87265b334def0daaadf3603cc62 (git) Affected: 43db6366fc2de02050e66389f5628d3fdc9af10a , < 4b45d7836b9526b8776af5f29219615be9417230 (git)
Linux	Linux	Affected: 7.1 Unaffected: 0 , < 7.1 (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/mtd/mtd_virt_concat.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d36520e5da8bf87265b334def0daaadf3603cc62",
              "status": "affected",
              "version": "43db6366fc2de02050e66389f5628d3fdc9af10a",
              "versionType": "git"
            },
            {
              "lessThan": "4b45d7836b9526b8776af5f29219615be9417230",
              "status": "affected",
              "version": "43db6366fc2de02050e66389f5628d3fdc9af10a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/mtd/mtd_virt_concat.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.1"
            },
            {
              "lessThan": "7.1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "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": "7.1.6",
                  "versionStartIncluding": "7.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "7.1",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: virt_concat: fix use-after-free in mtd_virt_concat_destroy()\n\nmtd_concat_destroy() frees item-\u003econcat so calling\nmtd_virt_concat_put_mtd_devices(item-\u003econcat) after that leads to a\nuse-after-free.\n\nFix it by moving mtd_virt_concat_put_mtd_devices() before\nmtd_concat_destroy()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:05:18.750Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d36520e5da8bf87265b334def0daaadf3603cc62"
        },
        {
          "url": "https://git.kernel.org/stable/c/4b45d7836b9526b8776af5f29219615be9417230"
        }
      ],
      "title": "mtd: virt_concat: fix use-after-free in mtd_virt_concat_destroy()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68423",
    "datePublished": "2026-08-10T12:04:43.942Z",
    "dateReserved": "2026-07-30T09:28:09.392Z",
    "dateUpdated": "2026-08-17T05:05:18.750Z",
    "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.

Action not permitted

GHSA-8HQQ-JF47-JQRX

CVE-2026-68423 (GCVE-0-2026-68423)

Tags

Sightings

Nomenclature