af_unix: Return immediately when manage_oob() returns NULL for 0-length buffer.
In the Linux kernel, the following vulnerability has been resolved: af_unix: Return immediately when manage_oob() returns NULL for 0-length buffer. Fahad Alharbi reported that recv(0, MSG_PEEK) triggers busy-wait in unix_stream_read_generic() if recv() is blocking and the last skb in the queue is MSG_OOB skb. In such a situation, TCP returns 0 immediately regardless of blocking or non-blocking. Let's follow the behaviour.
CVE-2026-98394
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-2026-98394
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": "314001f0bf927015e459c9d387d62a231fe93af3",
"lessThan": "3d3c7a3df66b2ca3d2cd1a2a0c37eb701feba713",
"versionType": "git"
},
{
"status": "affected",
"version": "314001f0bf927015e459c9d387d62a231fe93af3",
"lessThan": "d5dd55b316ca229a4cbf11729483ba5bb57233e7",
"versionType": "git"
},
{
"status": "affected",
"version": "314001f0bf927015e459c9d387d62a231fe93af3",
"lessThan": "c81c5be3826c8467945b964d0cf7f7b3d65461db",
"versionType": "git"
},
{
"status": "affected",
"version": "314001f0bf927015e459c9d387d62a231fe93af3",
"lessThan": "6e5ee08eb5858d175da6768d75d163817b6a9d4a",
"versionType": "git"
}
],
"programFiles": [
"net/unix/af_unix.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"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": [
"net/unix/af_unix.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98394
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38461 · Revision 1
- Added to Heist Feed
- Publisher date