Linux Kernel Vulnerability in IO Throttling Mechanism
CVE-2025-38063
What is CVE-2025-38063?
The identified flaw in the Linux kernel's IO throttling mechanism involves the management of flush_bio requests generated during metadata operations. A misconfiguration with REQ_PREFLUSH led to unintended throttling of metadata bio submissions, particularly during high load scenarios. This vulnerability can lead to performance degradation by causing unnecessary delays in processing critical file operations. The fix ensures that flush_bio is conditionally updated, preventing wbt_wait from triggering under normal circumstances, thus improving operational efficiency.
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Affected Version(s)
Linux e34cbd307477ae07c5d8a8d0bd15e65a9ddaba5c < 95d08924335f3b6f4ea0b92ebfe4fe0731c502d9
Linux e34cbd307477ae07c5d8a8d0bd15e65a9ddaba5c < 52aa28f7b1708d76e315d78b5ed397932a1a97c3
Linux e34cbd307477ae07c5d8a8d0bd15e65a9ddaba5c