{"uuid": "42a84cbf-5a59-479c-96cc-f24f48b51e0d", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2025-21832", "type": "published-proof-of-concept", "source": "https://t.me/DarkWebInformer_CVEAlerts/6704", "content": "\ud83d\udd17 DarkWebInformer.com - Cyber Threat Intelligence\n\ud83d\udccc CVE ID: CVE-2025-21832\n\ud83d\udd25 CVSS Score: N/A\n\ud83d\udd39 Description: In the Linux kernel, the following vulnerability has been resolved:\n\nblock: don't revert iter for -EIOCBQUEUED\n\nblkdev_read_iter() has a few odd checks, like gating the position and\ncount adjustment on whether or not the result is bigger-than-or-equal to\nzero (where bigger than makes more sense), and not checking the return\nvalue of blkdev_direct_IO() before doing an iov_iter_revert(). The\nlatter can lead to attempting to revert with a negative value, which\nwhen passed to iov_iter_revert() as an unsigned value will lead to\nthrowing a WARN_ON() because unroll is bigger than MAX_RW_COUNT.\n\nBe sane and don't revert for -EIOCBQUEUED, like what is done in other\nspots.\n\ud83d\udccf Published: 2025-03-06T16:22:34.125Z\n\ud83d\udccf Modified: 2025-03-06T16:22:34.125Z\n\ud83d\udd17 References:\n1. https://git.kernel.org/stable/c/6c26619effb1b4cb7d20b4e666ab8f71f6a53ccb\n2. https://git.kernel.org/stable/c/84671b0630ccb46ae9f1f99a45c7d63ffcd6a474\n3. https://git.kernel.org/stable/c/68f16d3034a06661245ecd22f0d586a8b4e7c473\n4. https://git.kernel.org/stable/c/a58f136bad29f9ae721a29d98c042fddbee22f77\n5. https://git.kernel.org/stable/c/b13ee668e8280ca5b07f8ce2846b9957a8a10853", "creation_timestamp": "2025-03-06T16:34:02.000000Z"}