netfs: Fix uninitialized return value in netfs_unbuffered_write()
In the Linux kernel, the following vulnerability has been resolved: netfs: Fix uninitialized return value in netfs_unbuffered_write() If preparation of the first subrequest fails, netfs_unbuffered_write() exits its loop before ret is initialized. The empty-iterator check can do the same. For synchronous writes, netfs_unbuffered_write_iter_locked() may then return an unrelated error instead of wreq->error. This is reachable through CIFS if cifs_prepare_write() fails to reopen the file or obtain credits. Initialize ret to 0 so the caller returns wreq->error if no data was written, or the number of bytes already written otherwise. Found with Clang's -Wconditional-uninitialized.
CVE-2026-97610
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-2026-97610
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": "72d08d2839649d1c5efbe375751f4473fa4486af",
"lessThan": "3d038eebdbd400c3bc4b66bd8aa0dff0c2bcce26",
"versionType": "git"
},
{
"status": "affected",
"version": "a0b4c7a49137ed21279f354eb59f49ddae8dffc2",
"lessThan": "2e38d500471d097cda87d7d374bbc1b13493075d",
"versionType": "git"
},
{
"status": "affected",
"version": "a0b4c7a49137ed21279f354eb59f49ddae8dffc2",
"lessThan": "f18e8774f4d3137fa0a5fb8ffa83d59a719666d8",
"versionType": "git"
},
{
"status": "affected",
"version": "0c29f6d63122a0168d67cb8ecde5b4cf7fe4acb0",
"versionType": "git"
},
{
"status": "affected",
"version": "6.18.17",
"lessThan": "6.18.53",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.19.7",
"lessThan": "6.20",
"versionType": "semver"
}
],
"programFiles": [
"fs/netfs/direct_write.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "7.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.7",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/netfs/direct_write.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-97610
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38051 · Revision 1
- Added to Heist Feed
- Publisher date