CVE-2023-53636 (GCVE-0-2023-53636)

Vulnerability from cvelistv5 – Published: 2025-10-07 15:19 – Updated: 2025-10-07 15:19
VLAI?
Title
clk: microchip: fix potential UAF in auxdev release callback
Summary
In the Linux kernel, the following vulnerability has been resolved: clk: microchip: fix potential UAF in auxdev release callback Similar to commit 1c11289b34ab ("peci: cpu: Fix use-after-free in adev_release()"), the auxiliary device is not torn down in the correct order. If auxiliary_device_add() fails, the release callback will be called twice, resulting in a UAF. Due to timing, the auxdev code in this driver "took inspiration" from the aforementioned commit, and thus its bugs too! Moving auxiliary_device_uninit() to the unregister callback instead avoids the issue.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: b56bae2dd6fda6baf3bb74af3812676eebdd52f2 , < 5b4052aa956e11bcd19e50ca559eb38dcb46201b (git)
Affected: b56bae2dd6fda6baf3bb74af3812676eebdd52f2 , < d7d6dacf39ed102d7667721ca1700022c9c8b11a (git)
Affected: b56bae2dd6fda6baf3bb74af3812676eebdd52f2 , < 934406b2d42eaf3fc57f5546cc68ff7ab9680bb3 (git)
Affected: b56bae2dd6fda6baf3bb74af3812676eebdd52f2 , < 7455b7007b9e93bcc2bc9c1c6c73a228e3152069 (git)
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    Linux Linux Affected: 6.1
Unaffected: 0 , < 6.1 (semver)
Unaffected: 6.1.28 , ≤ 6.1.* (semver)
Unaffected: 6.2.15 , ≤ 6.2.* (semver)
Unaffected: 6.3.2 , ≤ 6.3.* (semver)
Unaffected: 6.4 , ≤ * (original_commit_for_fix)
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nclk: microchip: fix potential UAF in auxdev release callback\n\nSimilar to commit 1c11289b34ab (\"peci: cpu: Fix use-after-free in\nadev_release()\"), the auxiliary device is not torn down in the correct\norder. If auxiliary_device_add() fails, the release callback will be\ncalled twice, resulting in a UAF. Due to timing, the auxdev code in this\ndriver \"took inspiration\" from the aforementioned commit, and thus its\nbugs too!\n\nMoving auxiliary_device_uninit() to the unregister callback instead\navoids the issue."
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        "dateUpdated": "2025-10-07T15:19:37.655Z",
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        "shortName": "Linux"
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    "datePublished": "2025-10-07T15:19:37.655Z",
    "dateReserved": "2025-10-07T15:16:59.657Z",
    "dateUpdated": "2025-10-07T15:19:37.655Z",
    "state": "PUBLISHED"
  },
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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