In the Linux kernel, the following vulnerability has been resolved:
ip6: vti: Use ip6_tnl.net in vti6_changelink().
ip netns add ns1
ip netns add ns2
ip -n ns1 link add vti6_test type vti6 remote ::1 local ::2 key 7
ip -n ns1 link set vti6_test netns ns2
ip -n ns2 link set vti6_test type vti6 remote ::3 local ::4 key 9
ip netns del ns2
ip netns del ns1
[ 132.495484] ------------[ cut here ]------------
[ 132.497609] kernel BUG at net/core/dev.c:12376!
Commit 61220ab34948 ("vti6: Enable namespace changing") dropped
NETIF_F_NETNS_LOCAL from vti6 devices. A vti6 tunnel can then
move through IFLA_NET_NS_FD. After the move dev_net(dev) points
at the new netns while t->net stays at the creation netns.
vti6_changelink() and vti6_update() still use dev_net(dev) and
dev_net(t->dev). They unlink from one per netns hash and relink
into another. The creation netns is left with a stale entry.
cleanup_net() of that netns later walks freed memory.
Reachable from an unprivileged user namespace (unshare --user
--map-root-user --net). Cross tenant scope on container hosts.
References
Configurations
Configuration 1 (hide)
|
History
30 Oct 2026, 17:44
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/0cdce7618464f7fb06f461e8f4ad575cb1d570f4 - Patch | |
| References | () https://git.kernel.org/stable/c/11b326fb0a374f4654f9be22d0f0f7abd9f7d3fe - Patch | |
| References | () https://git.kernel.org/stable/c/225b467e3b631f38be22e4b38062a1fed02fdd21 - Patch | |
| References | () https://git.kernel.org/stable/c/d9c5eecdb3c740e65038651db7c686b10d76d1bc - Patch | |
| References | () https://git.kernel.org/stable/c/ee1778ba0f5cb53be771f97017d01eb356c797bf - Patch | |
| References | () https://git.kernel.org/stable/c/f1e89a943ee574d0f2f16246eb3f2d7330fdeb03 - Patch | |
| References | () https://git.kernel.org/stable/c/f5c68875e25f331e497ddfbe81e2d8163a87f136 - Patch | |
| References | () https://git.kernel.org/stable/c/fc32be9ac2788524c6b24efd681cce7a6e731a92 - Patch | |
| First Time |
Linux linux Kernel
Linux |
|
| 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:*:*:*:*:*:* |
|
| CWE | NVD-CWE-noinfo |
19 Oct 2026, 21:17
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-416 |
Information
Published : 2026-07-19 16:17
Updated : 2026-10-30 17:44
NVD link : CVE-2026-63917
Mitre link : CVE-2026-63917
CVE.ORG link : CVE-2026-63917
JSON object : View
Products Affected
linux
- linux_kernel
CWE