CVE-2025-38584 (GCVE-0-2025-38584)

Vulnerability from cvelistv5 – Published: 2025-08-19 17:03 – Updated: 2026-05-17 15:21
VLAI
Title
padata: Fix pd UAF once and for all
Summary
In the Linux kernel, the following vulnerability has been resolved: padata: Fix pd UAF once and for all There is a race condition/UAF in padata_reorder that goes back to the initial commit. A reference count is taken at the start of the process in padata_do_parallel, and released at the end in padata_serial_worker. This reference count is (and only is) required for padata_replace to function correctly. If padata_replace is never called then there is no issue. In the function padata_reorder which serves as the core of padata, as soon as padata is added to queue->serial.list, and the associated spin lock released, that padata may be processed and the reference count on pd would go away. Fix this by getting the next padata before the squeue->serial lock is released. In order to make this possible, simplify padata_reorder by only calling it once the next padata arrives.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 16295bec6398a3eedc9377e1af6ff4c71b98c300 , < a11a12a9880ab37342b73c93cfe1a3ada02ff0db (git)
Affected: 16295bec6398a3eedc9377e1af6ff4c71b98c300 , < f231d5d001ec75f5886c02d496a4c79edc383d45 (git)
Affected: 16295bec6398a3eedc9377e1af6ff4c71b98c300 , < dbe3e911a59bda6de96e7cae387ff882c2c177fa (git)
Affected: 16295bec6398a3eedc9377e1af6ff4c71b98c300 , < cdf79bd2e1ecb3cc75631c73d8f4149be6019a52 (git)
Affected: 16295bec6398a3eedc9377e1af6ff4c71b98c300 , < 71203f68c7749609d7fc8ae6ad054bdedeb24f91 (git)
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Linux Linux Affected: 2.6.34
Unaffected: 0 , < 2.6.34 (semver)
Unaffected: 6.6.140 , ≤ 6.6.* (semver)
Unaffected: 6.12.86 , ≤ 6.12.* (semver)
Unaffected: 6.15.10 , ≤ 6.15.* (semver)
Unaffected: 6.16.1 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
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}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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