ipvs: clear IPv4 options after rebasing tunnel ICMP errors
In the Linux kernel, the following vulnerability has been resolved: ipvs: clear IPv4 options after rebasing tunnel ICMP errors ip_vs_in_icmp() rebases an skb from the outer ICMP packet to the quoted original request before passing it to icmp_send(). However, IPCB(skb)->opt still describes the outer IPv4 header. A timestamp option in the outer header can therefore leave an offset that points into the quoted transport header after the rebase. __ip_options_echo() treats a byte at that stale location as the option length and copies it into the fixed-size option storage on the __icmp_send() stack, causing a stack out-of-bounds write. Clear the stale option metadata after resetting the network header. Keep the remaining control block fields, including the ingress interface used by the ICMP response path.
CVE-2026-74669
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-2026-74669
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": "f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e",
"lessThan": "79ffa99202c944467e28b13b513bf2998732edff",
"versionType": "git"
},
{
"status": "affected",
"version": "f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e",
"lessThan": "c9413b50204738fbc429bb86bf01353c393a6c28",
"versionType": "git"
},
{
"status": "affected",
"version": "f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e",
"lessThan": "37c61b3745129cbd682c557b51345828120972e5",
"versionType": "git"
},
{
"status": "affected",
"version": "f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e",
"lessThan": "ed246dd85ebf27c1f6b7897834d40786c0ca3006",
"versionType": "git"
},
{
"status": "affected",
"version": "f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e",
"lessThan": "6f46fc460e9316062bdcdf89199eb5d7a33da33b",
"versionType": "git"
},
{
"status": "affected",
"version": "f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e",
"lessThan": "75eec935444db4af2123e0491936f6e273d7ea00",
"versionType": "git"
},
{
"status": "affected",
"version": "f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e",
"lessThan": "384b4dae14277d369221d187e9b3af56c79d2e50",
"versionType": "git"
},
{
"status": "affected",
"version": "f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e",
"lessThan": "e0ba936287dfe9783426aac27e5fd76fe35b38c9",
"versionType": "git"
}
],
"programFiles": [
"net/netfilter/ipvs/ip_vs_core.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.7"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.152",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.104",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.45",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.9",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/netfilter/ipvs/ip_vs_core.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74669
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #34267 · Revision 1
- Added to Heist Feed
- Publisher date