CVE - CVE-2025-21832

CVE-ID
CVE-2025-21832	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: block: don't revert iter for -EIOCBQUEUED blkdev_read_iter() has a few odd checks, like gating the position and count adjustment on whether or not the result is bigger-than-or-equal to zero (where bigger than makes more sense), and not checking the return value of blkdev_direct_IO() before doing an iov_iter_revert(). The latter can lead to attempting to revert with a negative value, which when passed to iov_iter_revert() as an unsigned value will lead to throwing a WARN_ON() because unroll is bigger than MAX_RW_COUNT. Be sane and don't revert for -EIOCBQUEUED, like what is done in other spots.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/68f16d3034a06661245ecd22f0d586a8b4e7c473 URL:https://git.kernel.org/stable/c/68f16d3034a06661245ecd22f0d586a8b4e7c473 MISC:https://git.kernel.org/stable/c/6c26619effb1b4cb7d20b4e666ab8f71f6a53ccb URL:https://git.kernel.org/stable/c/6c26619effb1b4cb7d20b4e666ab8f71f6a53ccb MISC:https://git.kernel.org/stable/c/84671b0630ccb46ae9f1f99a45c7d63ffcd6a474 URL:https://git.kernel.org/stable/c/84671b0630ccb46ae9f1f99a45c7d63ffcd6a474 MISC:https://git.kernel.org/stable/c/a58f136bad29f9ae721a29d98c042fddbee22f77 URL:https://git.kernel.org/stable/c/a58f136bad29f9ae721a29d98c042fddbee22f77 MISC:https://git.kernel.org/stable/c/b13ee668e8280ca5b07f8ce2846b9957a8a10853 URL:https://git.kernel.org/stable/c/b13ee668e8280ca5b07f8ce2846b9957a8a10853
Assigning CNA
kernel.org
Date Record Created
20241229	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241229)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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