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Vulnerability DatabaseCVE-2025-38083
CVE-2025-38083:
Linux Kernel vulnerability analysis and mitigation
Overview
A race condition vulnerability (CVE-2025-38083) was discovered in the Linux kernel's PRIO scheduler component by Gerrard Tai. The vulnerability affects the prio_tune() function and was disclosed on June 20, 2025 (NVD, Wiz).
Technical details
The race condition occurs when the SFQ perturb timer fires at an inopportune time, creating a specific sequence between two CPUs: CPU 0 performs lock root, qdisctreeflushbacklog(), and unlock root operations, while CPU 1 executes lock root, rehash, and qdisctreereducebacklog() operations (NVD).
Impact
The vulnerability can be exploited to cause a parent's qlen underflow in the Linux kernel's network scheduler, potentially affecting network traffic management and system stability (Wiz).
Mitigation and workarounds
The vulnerability has been resolved by modifying the code to use qdiscpurgequeue() instead of qdisctreeflush_backlog(), ensuring that all packets are purged from the qdisc before the lock is released (Wiz).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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