block: don't revert iter for -EIOCBQUEUED
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.
CVE-2025-21832
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2025-21832
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3e1f941dd9f33776b3df4e30f741fe445ff773f3",
"lessThan": "6c26619effb1b4cb7d20b4e666ab8f71f6a53ccb",
"versionType": "git"
},
{
"status": "affected",
"version": "3e1f941dd9f33776b3df4e30f741fe445ff773f3",
"lessThan": "84671b0630ccb46ae9f1f99a45c7d63ffcd6a474",
"versionType": "git"
},
{
"status": "affected",
"version": "3e1f941dd9f33776b3df4e30f741fe445ff773f3",
"lessThan": "68f16d3034a06661245ecd22f0d586a8b4e7c473",
"versionType": "git"
},
{
"status": "affected",
"version": "3e1f941dd9f33776b3df4e30f741fe445ff773f3",
"lessThan": "a58f136bad29f9ae721a29d98c042fddbee22f77",
"versionType": "git"
},
{
"status": "affected",
"version": "3e1f941dd9f33776b3df4e30f741fe445ff773f3",
"lessThan": "b13ee668e8280ca5b07f8ce2846b9957a8a10853",
"versionType": "git"
}
],
"programFiles": [
"block/fops.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.17",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.129",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.78",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.14",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.13.3",
"versionType": "semver",
"lessThanOrEqual": "6.13.*"
},
{
"status": "unaffected",
"version": "6.14",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"block/fops.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-21832
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30436 · Revision 1
- Added to Heist Feed
- Publisher date