CVE-2025-21832
block: don't revert iter for -EIOCBQUEUED
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.
INFO
Published Date :
March 6, 2025, 5:15 p.m.
Last Modified :
Nov. 3, 2025, 9:19 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the Linux kernel to the latest stable version.
- Apply the specific patch provided for the block subsystem.
- Recompile and deploy the updated kernel.
- Verify the fix by testing block device read operations.
Public PoC/Exploit Available at Github
CVE-2025-21832 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-21832.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-21832 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-21832
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
discovered zero day/CVEs exploits on the nubia redmagic 9spro models, 9.06.2025
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-21832 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-21832 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 03, 2025
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html -
Initial Analysis by [email protected]
Oct. 29, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:5.17:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.17:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.17:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.17:-:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.17:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.17:rc7:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.17.1 up to (excluding) 6.1.129 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.78 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.14 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.13.3 *cpe:2.3:o:linux:linux_kernel:5.17:rc8:*:*:*:*:*:* Added Reference Type kernel.org: https://git.kernel.org/stable/c/68f16d3034a06661245ecd22f0d586a8b4e7c473 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/6c26619effb1b4cb7d20b4e666ab8f71f6a53ccb Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/84671b0630ccb46ae9f1f99a45c7d63ffcd6a474 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/a58f136bad29f9ae721a29d98c042fddbee22f77 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/b13ee668e8280ca5b07f8ce2846b9957a8a10853 Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Mar. 06, 2025
Action Type Old Value New Value Added 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. Added Reference https://git.kernel.org/stable/c/68f16d3034a06661245ecd22f0d586a8b4e7c473 Added Reference https://git.kernel.org/stable/c/6c26619effb1b4cb7d20b4e666ab8f71f6a53ccb Added Reference https://git.kernel.org/stable/c/84671b0630ccb46ae9f1f99a45c7d63ffcd6a474 Added Reference https://git.kernel.org/stable/c/a58f136bad29f9ae721a29d98c042fddbee22f77 Added Reference https://git.kernel.org/stable/c/b13ee668e8280ca5b07f8ce2846b9957a8a10853