CVE-2026-98000 (GCVE-0-2026-98000)

Vulnerability from cvelistv5 – Published: 2026-09-25 10:23 – Updated: 2026-09-25 10:23
VLAI
Title
hwmon: Fix potential UAF in pec_store
Summary
In the Linux kernel, the following vulnerability has been resolved: hwmon: Fix potential UAF in pec_store Sashiko reports: In pec_store(), a guard(mutex)(&hwdev->lock) is taken. If the chip write operation returns an error other than -EOPNOTSUPP, the code jumps to the put label, which calls put_device(hdev). If this drops the final reference, the device is freed. When the function then returns, the guard cleanup function runs and attempts to unlock the freed mutex. Use scoped_guard() instead of guard() to avoid the problem.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 3ad2a7b9b15d5072139a20be84adb36776eb6c9b , < 8afab57bcdbc2186f325972e777880ac5a220f4f (git)
Affected: 3ad2a7b9b15d5072139a20be84adb36776eb6c9b , < 01dd8b4fc2cf83c66565c0f382fb1841e9000a89 (git)
Affected: 3ad2a7b9b15d5072139a20be84adb36776eb6c9b , < 354ccc99b2dc8ba0cf6d4de34e520bcf6ecca5c2 (git)
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Linux Linux Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2.7 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc3 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: Fix potential UAF in pec_store\n\nSashiko reports:\n\nIn pec_store(), a guard(mutex)(\u0026hwdev-\u003elock) is taken. If the chip write\noperation returns an error other than -EOPNOTSUPP, the code jumps to the\nput label, which calls put_device(hdev). If this drops the final reference,\nthe device is freed. When the function then returns, the guard cleanup\nfunction runs and attempts to unlock the freed mutex.\n\nUse scoped_guard() instead of guard() to avoid the problem."
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    "dateReserved": "2026-09-25T10:19:56.068Z",
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: Fix potential UAF in pec_store\n\nSashiko reports:\n\nIn pec_store(), a guard(mutex)(\u0026hwdev-\u003elock) is taken. If the chip write\noperation returns an error other than -EOPNOTSUPP, the code jumps to the\nput label, which calls put_device(hdev). If this drops the final reference,\nthe device is freed. When the function then returns, the guard cleanup\nfunction runs and attempts to unlock the freed mutex.\n\nUse scoped_guard() instead of guard() to avoid the problem."
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}



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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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