net: l2tp: do not propagate multicast notification errors
In the Linux kernel, the following vulnerability has been resolved: net: l2tp: do not propagate multicast notification errors The tunnel create, tunnel modify, session create, and session modify netlink handlers send multicast notifications through helpers that can fail while allocating or encoding a message, or while multicasting it. For tunnel and session create/modify, a notification is sent after the live operation has completed. Returning a best-effort notification error as the command result can therefore report failure for an operation that already committed and can cause callers to retry and accumulate live objects. Keep sending notifications for listener visibility, but do not propagate their best-effort status as the command result. This also keeps the tunnel modify command consistent with the other notification-only paths.
CVE-2026-80996
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-2026-80996
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": "33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b",
"lessThan": "7efe1c31e0903a5aa796feb96d3adab574b7ff41",
"versionType": "git"
},
{
"status": "affected",
"version": "33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b",
"lessThan": "0fe037d5eaad938aa3e9143ee071aa237750b42b",
"versionType": "git"
},
{
"status": "affected",
"version": "33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b",
"lessThan": "9c340473f4822bb31b151c19afd17448eda5acd1",
"versionType": "git"
},
{
"status": "affected",
"version": "33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b",
"lessThan": "50c4038f1670bf9a80c6a58ae83d1602decd8481",
"versionType": "git"
},
{
"status": "affected",
"version": "33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b",
"lessThan": "af20e269f7459d2ce69887fdf2fad7caf986c865",
"versionType": "git"
}
],
"programFiles": [
"net/l2tp/l2tp_netlink.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/l2tp/l2tp_netlink.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80996
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46653 · Revision 1
- Added to Heist Feed
- Publisher date