xfrm: route MIGRATE notifications to caller's netns
In the Linux kernel, the following vulnerability has been resolved: xfrm: route MIGRATE notifications to caller's netns xfrm_send_migrate() in net/xfrm/xfrm_user.c and pfkey_send_migrate() in net/key/af_key.c both hardcode &init_net for the multicast that announces a successful XFRM_MSG_MIGRATE / SADB_X_MIGRATE. XFRM_MSG_MIGRATE arrives on a per-netns NETLINK_XFRM socket, and the rest of the xfrm/af_key netlink path was made netns-aware in 2008. The other 14 multicast paths in xfrm_user.c route their event using xs_net(x), xp_net(xp) or sock_net(skb->sk); only the migrate path was missed. Two consequences of the init_net hardcoding: 1. The notification (selector, old/new endpoint addresses, and the km_address) is delivered to listeners on init_net's XFRMNLGRP_MIGRATE / pfkey BROADCAST_ALL groups rather than on the issuing netns. An IKE daemon running in init_net therefore receives migration notifications originating from any other netns on the host. 2. An IKE daemon running inside a non-init netns and subscribed to its own XFRMNLGRP_MIGRATE / pfkey groups never receives the notification of its own migration. IKEv2 MOBIKE / address-update handling inside a netns is silently broken. Thread struct net through km_migrate() and the xfrm_mgr.migrate function pointer, drop the &init_net override in xfrm_send_migrate() and pfkey_send_migrate(), and pass the caller's net (already in scope in xfrm_migrate() via sock_net(skb->sk)) all the way down. struct xfrm_mgr is in-tree only and no
CVE-2026-63914
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-2026-63914
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": "5c79de6e79cd8ecfbae28886be3ee49044f3a4d4",
"lessThan": "bafc7d0774b9bf52909c70ed990bc5ccf7ec4bad",
"versionType": "git"
},
{
"status": "affected",
"version": "5c79de6e79cd8ecfbae28886be3ee49044f3a4d4",
"lessThan": "6df8157547347b5257bf640a0ae3dfc4411e06cd",
"versionType": "git"
},
{
"status": "affected",
"version": "5c79de6e79cd8ecfbae28886be3ee49044f3a4d4",
"lessThan": "fe463798343382c8fe9416a95959f005a3c30aa5",
"versionType": "git"
},
{
"status": "affected",
"version": "5c79de6e79cd8ecfbae28886be3ee49044f3a4d4",
"lessThan": "00f2c451e57df50b1151d9b2254878f106b7c892",
"versionType": "git"
},
{
"status": "affected",
"version": "5c79de6e79cd8ecfbae28886be3ee49044f3a4d4",
"lessThan": "a306cf2ac8849c487791369fad6f216399d000f6",
"versionType": "git"
},
{
"status": "affected",
"version": "5c79de6e79cd8ecfbae28886be3ee49044f3a4d4",
"lessThan": "448bb92ca101dde8a6e88b4dc824044b4e341604",
"versionType": "git"
},
{
"status": "affected",
"version": "5c79de6e79cd8ecfbae28886be3ee49044f3a4d4",
"lessThan": "26ce8dbf2e23fe4fcc3351d19ef6d3fb703ed126",
"versionType": "git"
},
{
"status": "affected",
"version": "5c79de6e79cd8ecfbae28886be3ee49044f3a4d4",
"lessThan": "7e2a4f7ca0952820731ef7bdadfc9a9e9d3571b4",
"versionType": "git"
}
],
"programFiles": [
"include/net/xfrm.h",
"net/key/af_key.c",
"net/xfrm/xfrm_policy.c",
"net/xfrm/xfrm_state.c",
"net/xfrm/xfrm_user.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.21"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.21",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.259",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.210",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.176",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.143",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.93",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.35",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.12",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"include/net/xfrm.h",
"net/key/af_key.c",
"net/xfrm/xfrm_policy.c",
"net/xfrm/xfrm_state.c",
"net/xfrm/xfrm_user.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-63914
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40889 · Revision 1
- Added to Heist Feed
- Publisher date