CVE-2025-38584
HighCVSS 7.0Exploitation Probability (EPSS)
Low risk6th percentile - higher than 6% of all known CVEs
Summary
W jądrze systemu Linux naprawiono podatność związaną z warunkiem wyścigu oraz użyciem po zwolnieniu (UAF) w funkcji padata_reorder. Problem polegał na niewłaściwym zarządzaniu licznikiem referencji, co mogło prowadzić do błędów w przetwarzaniu padata.
Risk Assessment
Organizacje mogą być narażone na problemy z integralnością danych oraz stabilnością systemu, jeśli nie zastosują odpowiednich poprawek. W przypadku wykorzystania tej podatności, atakujący mógłby potencjalnie wpłynąć na działanie systemu.
Recommendation
Zaleca się aktualizację jądra systemu Linux do najnowszej wersji, aby usunąć tę podatność. Należy również monitorować systemy pod kątem nieautoryzowanych zmian i wdrożyć odpowiednie procedury bezpieczeństwa.
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Original NVD description (English source)
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.

