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

Vulnerability from cvelistv5 – Published: 2026-07-24 15:27 – Updated: 2026-07-24 15:27
VLAI
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
References
Impacted products
Vendor Product Version
Linux Linux Affected: 710abda58055ed5eaa8958107633cc12a365c328 , < a554dfcd30dd5e41d1d67387b3bb85cea83e12e1 (git)
Affected: 710abda58055ed5eaa8958107633cc12a365c328 , < a1b836607304f71051f9f9dcccf8b5097b86a1fb (git)
Affected: 28f488e7b327630686378bb1d24e22cfc3fc162d (git)
Affected: 6.19.12 , < 6.20 (semver)
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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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{
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      "descriptions": [
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          "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"
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      "title": "gpio: shared: fix deadlock on shared proxy\u0027s parent removal",
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    "datePublished": "2026-07-24T15:27:42.482Z",
    "dateReserved": "2026-07-19T15:36:31.772Z",
    "dateUpdated": "2026-07-24T15:27:42.482Z",
    "state": "PUBLISHED"
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    "redhat_vex": {
      "aggregate_severity": "None",
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      "cve": "CVE-2026-64238",
      "id": "CVE-2026-64238",
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      "product_status:known_affected": "3",
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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: gpio: shared: fix deadlock on shared proxy\u0027s parent removal",
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      "cve": "CVE-2026-64238",
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      "source": "SUSE CSAF VEX",
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      "title": "SUSE CVE CVE-2026-64238",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64238.json",
      "version": "3"
    }
  }
}



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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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