Block Device Vulnerability in Linux Kernel
CVE-2025-21832
What is CVE-2025-21832?
A vulnerability in the Linux kernel's block device handling has been identified, specifically within the blkdev_read_iter() function. This issue arises from improper checks related to the return values of blkdev_direct_IO(), which may lead to incorrect handling of negative return values during an iov_iter_revert operation. Consequently, this mismanagement could generate warnings due to excess unroll attempts. To mitigate such occurrences, the system should abstain from reverting operations for -EIOCBQUEUED to ensure proper functionality and stability.
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Affected Version(s)
Linux 3e1f941dd9f33776b3df4e30f741fe445ff773f3 < 6c26619effb1b4cb7d20b4e666ab8f71f6a53ccb
Linux 3e1f941dd9f33776b3df4e30f741fe445ff773f3 < 84671b0630ccb46ae9f1f99a45c7d63ffcd6a474
Linux 3e1f941dd9f33776b3df4e30f741fe445ff773f3 < 68f16d3034a06661245ecd22f0d586a8b4e7c473