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GHSA-3QFM-27PW-9J46

Vulnerability from github – Published: 2026-07-24 18:31 – Updated: 2026-07-24 18:31

Details

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

gpio: shared: fix deadlock on shared proxy's parent removal

Commit 710abda58055 ("gpio: shared: call gpio_chip::of_xlate() if set") used the mutex embedded in struct gpio_shared_entry to protect the offset field which now can be modified after assignment. The critical section however is too wide and introduced a potential deadlock on the removal of the shared GPIO proxy's parent.

Make the critical section shorter - only protect the offset when it's being read.

While at it: mention the fact that the entry lock is now also used to protect against concurrent access to the offset field in the structure's documentation.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64238"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-24T16:16:53Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: shared: fix deadlock on shared proxy\u0027s parent removal\n\nCommit 710abda58055 (\"gpio: shared: call gpio_chip::of_xlate() if set\")\nused the mutex embedded in struct gpio_shared_entry to protect the\noffset field which now can be modified after assignment. The critical\nsection however is too wide and introduced a potential deadlock on the\nremoval of the shared GPIO proxy\u0027s parent.\n\nMake the critical section shorter - only protect the offset when it\u0027s\nbeing read.\n\nWhile at it: mention the fact that the entry lock is now also used to\nprotect against concurrent access to the offset field in the structure\u0027s\ndocumentation.",
  "id": "GHSA-3qfm-27pw-9j46",
  "modified": "2026-07-24T18:31:28Z",
  "published": "2026-07-24T18:31:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64238"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a1b836607304f71051f9f9dcccf8b5097b86a1fb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a554dfcd30dd5e41d1d67387b3bb85cea83e12e1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-64238 (GCVE-0-2026-64238)

Vulnerability from cvelistv5 – Published: 2026-07-24 15:27 – Updated: 2026-07-24 15:27

Title

gpio: shared: fix deadlock on shared proxy's parent removal

Summary

In the Linux kernel, the following vulnerability has been resolved: gpio: shared: fix deadlock on shared proxy's parent removal Commit 710abda58055 ("gpio: shared: call gpio_chip::of_xlate() if set") used the mutex embedded in struct gpio_shared_entry to protect the offset field which now can be modified after assignment. The critical section however is too wide and introduced a potential deadlock on the removal of the shared GPIO proxy's parent. Make the critical section shorter - only protect the offset when it's being read. While at it: mention the fact that the entry lock is now also used to protect against concurrent access to the offset field in the structure's documentation.

Severity

No CVSS data available.

Assigner

Linux

References

2 references

URL	Tags
https://git.kernel.org/stable/c/a554dfcd30dd5e41d…
https://git.kernel.org/stable/c/a1b836607304f7105…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 710abda58055ed5eaa8958107633cc12a365c328 , < a554dfcd30dd5e41d1d67387b3bb85cea83e12e1 (git) Affected: 710abda58055ed5eaa8958107633cc12a365c328 , < a1b836607304f71051f9f9dcccf8b5097b86a1fb (git) Affected: 28f488e7b327630686378bb1d24e22cfc3fc162d (git) Affected: 6.19.12 , < 6.20 (semver)
Linux	Linux	Affected: 7.0 Unaffected: 0 , < 7.0 (semver) Unaffected: 7.0.12 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpio/gpiolib-shared.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a554dfcd30dd5e41d1d67387b3bb85cea83e12e1",
              "status": "affected",
              "version": "710abda58055ed5eaa8958107633cc12a365c328",
              "versionType": "git"
            },
            {
              "lessThan": "a1b836607304f71051f9f9dcccf8b5097b86a1fb",
              "status": "affected",
              "version": "710abda58055ed5eaa8958107633cc12a365c328",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "28f488e7b327630686378bb1d24e22cfc3fc162d",
              "versionType": "git"
            },
            {
              "lessThan": "6.20",
              "status": "affected",
              "version": "6.19.12",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpio/gpiolib-shared.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.0"
            },
            {
              "lessThan": "7.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.12",
                  "versionStartIncluding": "7.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "7.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.19.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: shared: fix deadlock on shared proxy\u0027s parent removal\n\nCommit 710abda58055 (\"gpio: shared: call gpio_chip::of_xlate() if set\")\nused the mutex embedded in struct gpio_shared_entry to protect the\noffset field which now can be modified after assignment. The critical\nsection however is too wide and introduced a potential deadlock on the\nremoval of the shared GPIO proxy\u0027s parent.\n\nMake the critical section shorter - only protect the offset when it\u0027s\nbeing read.\n\nWhile at it: mention the fact that the entry lock is now also used to\nprotect against concurrent access to the offset field in the structure\u0027s\ndocumentation."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-24T15:27:42.482Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a554dfcd30dd5e41d1d67387b3bb85cea83e12e1"
        },
        {
          "url": "https://git.kernel.org/stable/c/a1b836607304f71051f9f9dcccf8b5097b86a1fb"
        }
      ],
      "title": "gpio: shared: fix deadlock on shared proxy\u0027s parent removal",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64238",
    "datePublished": "2026-07-24T15:27:42.482Z",
    "dateReserved": "2026-07-19T15:36:31.772Z",
    "dateUpdated": "2026-07-24T15:27:42.482Z",
    "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.

Action not permitted

GHSA-3QFM-27PW-9J46

CVE-2026-64238 (GCVE-0-2026-64238)

Tags

Sightings

Nomenclature