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 not exported as a stable API,
so the function-pointer signature change is internal.
pfkey_broadcast() is already netns-aware via net_generic(net,
pfkey_net_id) since the pernet conversion. The five other
pfkey_broadcast() callers in af_key.c already pass xs_net(x),
sock_net(sk) or a per-netns net, so this only removes the
&init_net outlier.
References
Configurations
Configuration 1 (hide)
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History
30 Oct 2026, 17:47
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/00f2c451e57df50b1151d9b2254878f106b7c892 - Patch | |
| References | () https://git.kernel.org/stable/c/26ce8dbf2e23fe4fcc3351d19ef6d3fb703ed126 - Patch | |
| References | () https://git.kernel.org/stable/c/448bb92ca101dde8a6e88b4dc824044b4e341604 - Patch | |
| References | () https://git.kernel.org/stable/c/6df8157547347b5257bf640a0ae3dfc4411e06cd - Patch | |
| References | () https://git.kernel.org/stable/c/7e2a4f7ca0952820731ef7bdadfc9a9e9d3571b4 - Patch | |
| References | () https://git.kernel.org/stable/c/a306cf2ac8849c487791369fad6f216399d000f6 - Patch | |
| References | () https://git.kernel.org/stable/c/bafc7d0774b9bf52909c70ed990bc5ccf7ec4bad - Patch | |
| References | () https://git.kernel.org/stable/c/fe463798343382c8fe9416a95959f005a3c30aa5 - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* |
|
| First Time |
Linux linux Kernel
Linux |
|
| CWE | CWE-668 |
19 Oct 2026, 21:17
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-862 |
Information
Published : 2026-07-19 16:17
Updated : 2026-10-30 17:47
NVD link : CVE-2026-63914
Mitre link : CVE-2026-63914
CVE.ORG link : CVE-2026-63914
JSON object : View
Products Affected
linux
- linux_kernel