CVE-2025-21832block: don't revert iter for -EIOCBQUEUED
Updated under an hour ago ()
Does this affect you?
It affects Linux and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from 3e1f941dd9f33776b3df4e30f741fe445ff773f3 before 6c26619effb1b4cb7d20b4e666ab8f71f6a53ccb; from 3e1f941dd9f33776b3df4e30f741fe445ff773f3 before 84671b0630ccb46ae9f1f99a45c7d63ffcd6a474; from 3e1f941dd9f33776b3df4e30f741fe445ff773f3 before 68f16d3034a06661245ecd22f0d586a8b4e7c473; from 3e1f941dd9f33776b3df4e30f741fe445ff773f3 before a58f136bad29f9ae721a29d98c042fddbee22f77; from 3e1f941dd9f33776b3df4e30f741fe445ff773f3 before b13ee668e8280ca5b07f8ce2846b9957a8a10853 | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
linux linux_kernel linux:linux_kernel | from 5.17.1 before 6.1.129; from 6.2 before 6.6.78; from 6.7 before 6.12.14; from 6.13 before 6.13.3; 5.17; 5.17; 5.17; 5.17; and 3 more ranges | NVD |
References
- https://git.kernel.org/stable/c/6c26619effb1b4cb7d20b4e666ab8f71f6a53ccbpatch
- https://git.kernel.org/stable/c/84671b0630ccb46ae9f1f99a45c7d63ffcd6a474patch
- https://git.kernel.org/stable/c/68f16d3034a06661245ecd22f0d586a8b4e7c473patch
- https://git.kernel.org/stable/c/a58f136bad29f9ae721a29d98c042fddbee22f77patch
- https://git.kernel.org/stable/c/b13ee668e8280ca5b07f8ce2846b9957a8a10853patch
- https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.