Vulnerability-Lookup

GHSA-GMMH-F7FW-32MM

Vulnerability from github – Published: 2026-05-01 15:30 – Updated: 2026-05-08 21:31

Details

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

auxdisplay: line-display: fix NULL dereference in linedisp_release

linedisp_release() currently retrieves the enclosing struct linedisp via to_linedisp(). That lookup depends on the attachment list, but the attachment may already have been removed before put_device() invokes the release callback. This can happen in linedisp_unregister(), and can also be reached from some linedisp_register() error paths.

In that case, to_linedisp() returns NULL and linedisp_release() dereferences it while freeing the display resources.

The struct device released here is the embedded linedisp->dev used by linedisp_register(), so retrieve the enclosing object directly with container_of() instead.

Severity ?

5.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-31753"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-01T15:16:38Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nauxdisplay: line-display: fix NULL dereference in linedisp_release\n\nlinedisp_release() currently retrieves the enclosing struct linedisp via\nto_linedisp(). That lookup depends on the attachment list, but the\nattachment may already have been removed before put_device() invokes the\nrelease callback. This can happen in linedisp_unregister(), and can also\nbe reached from some linedisp_register() error paths.\n\nIn that case, to_linedisp() returns NULL and linedisp_release()\ndereferences it while freeing the display resources.\n\nThe struct device released here is the embedded linedisp-\u003edev used by\nlinedisp_register(), so retrieve the enclosing object directly with\ncontainer_of() instead.",
  "id": "GHSA-gmmh-f7fw-32mm",
  "modified": "2026-05-08T21:31:19Z",
  "published": "2026-05-01T15:30:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31753"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/625fdac41cfc4ca9e1774a0d31d7985aec2c1d66"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7f138de156b20d9f9da6f72f90b63c01941d97d3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-31753 (GCVE-0-2026-31753)

Vulnerability from cvelistv5 – Published: 2026-05-01 14:14 – Updated: 2026-05-11 22:15

Title

auxdisplay: line-display: fix NULL dereference in linedisp_release

Summary

In the Linux kernel, the following vulnerability has been resolved: auxdisplay: line-display: fix NULL dereference in linedisp_release linedisp_release() currently retrieves the enclosing struct linedisp via to_linedisp(). That lookup depends on the attachment list, but the attachment may already have been removed before put_device() invokes the release callback. This can happen in linedisp_unregister(), and can also be reached from some linedisp_register() error paths. In that case, to_linedisp() returns NULL and linedisp_release() dereferences it while freeing the display resources. The struct device released here is the embedded linedisp->dev used by linedisp_register(), so retrieve the enclosing object directly with container_of() instead.

Severity ?

No CVSS data available.

Assigner

Linux

References

2 references

URL	Tags
https://git.kernel.org/stable/c/625fdac41cfc4ca9e…
https://git.kernel.org/stable/c/7f138de156b20d9f9…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 66c93809487e62c4f59ef08625a3fbc0a7de6dd2 , < 625fdac41cfc4ca9e1774a0d31d7985aec2c1d66 (git) Affected: 66c93809487e62c4f59ef08625a3fbc0a7de6dd2 , < 7f138de156b20d9f9da6f72f90b63c01941d97d3 (git)
Linux	Linux	Affected: 6.19 Unaffected: 0 , < 6.19 (semver) Unaffected: 6.19.12 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/auxdisplay/line-display.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "625fdac41cfc4ca9e1774a0d31d7985aec2c1d66",
              "status": "affected",
              "version": "66c93809487e62c4f59ef08625a3fbc0a7de6dd2",
              "versionType": "git"
            },
            {
              "lessThan": "7f138de156b20d9f9da6f72f90b63c01941d97d3",
              "status": "affected",
              "version": "66c93809487e62c4f59ef08625a3fbc0a7de6dd2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/auxdisplay/line-display.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.19"
            },
            {
              "lessThan": "6.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.12",
              "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": "6.19.12",
                  "versionStartIncluding": "6.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nauxdisplay: line-display: fix NULL dereference in linedisp_release\n\nlinedisp_release() currently retrieves the enclosing struct linedisp via\nto_linedisp(). That lookup depends on the attachment list, but the\nattachment may already have been removed before put_device() invokes the\nrelease callback. This can happen in linedisp_unregister(), and can also\nbe reached from some linedisp_register() error paths.\n\nIn that case, to_linedisp() returns NULL and linedisp_release()\ndereferences it while freeing the display resources.\n\nThe struct device released here is the embedded linedisp-\u003edev used by\nlinedisp_register(), so retrieve the enclosing object directly with\ncontainer_of() instead."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:15:08.690Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/625fdac41cfc4ca9e1774a0d31d7985aec2c1d66"
        },
        {
          "url": "https://git.kernel.org/stable/c/7f138de156b20d9f9da6f72f90b63c01941d97d3"
        }
      ],
      "title": "auxdisplay: line-display: fix NULL dereference in linedisp_release",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31753",
    "datePublished": "2026-05-01T14:14:44.953Z",
    "dateReserved": "2026-03-09T15:48:24.139Z",
    "dateUpdated": "2026-05-11T22:15:08.690Z",
    "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.

Action not permitted

GHSA-GMMH-F7FW-32MM

CVE-2026-31753 (GCVE-0-2026-31753)

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Nomenclature