fou: Don't allow 0 for FOU_ATTR_IPPROTO.
In the Linux kernel, the following vulnerability has been resolved: fou: Don't allow 0 for FOU_ATTR_IPPROTO. fou_udp_recv() has the same problem mentioned in the previous patch. If FOU_ATTR_IPPROTO is set to 0, skb is not freed by fou_udp_recv() nor "resubmit"-ted in ip_protocol_deliver_rcu(). Let's forbid 0 for FOU_ATTR_IPPROTO.
CVE-2026-23083
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-2026-23083
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": "23461551c00628c3f3fe9cf837bf53cf8f212b63",
"lessThan": "c7498f9bc390479ccfad7c7f2332237ff4945b03",
"versionType": "git"
},
{
"status": "affected",
"version": "23461551c00628c3f3fe9cf837bf53cf8f212b63",
"lessThan": "611ef4bd9c73d9e6d87bed57a635ff1fdd8c91ea",
"versionType": "git"
},
{
"status": "affected",
"version": "23461551c00628c3f3fe9cf837bf53cf8f212b63",
"lessThan": "6e983789b7588ee59cbf303583546c043bad8e19",
"versionType": "git"
},
{
"status": "affected",
"version": "23461551c00628c3f3fe9cf837bf53cf8f212b63",
"lessThan": "1cc98b8887cabb1808d2f4a37cd10a7be7574771",
"versionType": "git"
},
{
"status": "affected",
"version": "23461551c00628c3f3fe9cf837bf53cf8f212b63",
"lessThan": "b7db31a52c3862a1a32202a273a4c32e7f5f4823",
"versionType": "git"
},
{
"status": "affected",
"version": "23461551c00628c3f3fe9cf837bf53cf8f212b63",
"lessThan": "9b75dff8446ec871030d8daf5a69e74f5fe8b956",
"versionType": "git"
},
{
"status": "affected",
"version": "23461551c00628c3f3fe9cf837bf53cf8f212b63",
"lessThan": "7a9bc9e3f42391e4c187e099263cf7a1c4b69ff5",
"versionType": "git"
}
],
"programFiles": [
"Documentation/netlink/specs/fou.yaml",
"net/ipv4/fou_nl.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.18"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.18",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.249",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.199",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.162",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.122",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.68",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.8",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"Documentation/netlink/specs/fou.yaml",
"net/ipv4/fou_nl.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-23083
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #39743 · Revision 1
- Added to Heist Feed
- Publisher date