CVE-2026-46120

In the Linux kernel, the following vulnerability has been resolved: ip6_gre: Use cached t->net in ip6erspan_changelink(). After commit 5e72ce3e3980 ("net: ipv6: Use link netns in newlink() of rtnl_link_ops"), ip6erspan_newlink() correctly resolves the per-netns ip6gre hash via link_net. ip6erspan_changelink() was not converted in that series and still uses dev_net(dev), which diverges from the device's creation netns after IFLA_NET_NS_FD migration. This re-inserts the tunnel into the wrong per-netns hash. The original netns keeps a stale entry. When that netns is later destroyed, ip6gre_exit_rtnl_net() walks the stale entry, producing a slab-use-after-free reported by KASAN, followed by a kernel BUG at net/core/dev.c (LIST_POISON1) in unregister_netdevice_many_notify(). Reachable from an unprivileged user namespace (unshare --user --map-root-user --net). ip6gre_changelink() earlier in the same file already uses the cached t->net; only ip6erspan_changelink() has the wrong shape.

• CWE-416

• https://git.kernel.org/stable/c/01b71ff2857d3598337de11e7840a8e3ff21553cPatch
• https://git.kernel.org/stable/c/0fcf6731706f73494245a9c0d64f93bebf95bb51Patch
• https://git.kernel.org/stable/c/1d324c2f43f70c965f25c58cc3611c779adbe47ePatch
• https://git.kernel.org/stable/c/311fdd26eb4443d43b909cc67a10f3a5fd1b21b2Patch
• https://git.kernel.org/stable/c/7bd0f2b162b426b343a114e1b329f0d8d14fdc6ePatch
• https://git.kernel.org/stable/c/cf7fc624329e76c6394653d12353e1d033adea91Patch
• https://git.kernel.org/stable/c/e70cfb40c3a99b232cd42c6a6a10f0d8e039dc82Patch
• https://git.kernel.org/stable/c/eca62bb0569de4d43a4dac06a2092a9d4ca1d702Patch

Published

May 28, 2026

Last Modified

Jun 24, 2026

Status

Undergoing Analysis

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-46115In the Linux kernel, the following vulnerability has been re…9.8
• CVE-2026-46116In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-46117In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-46118In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2026-46119In the Linux kernel, the following vulnerability has been re…9.1
• CVE-2026-4612A vulnerability has been found in itsourcecode Free Hotel Re…7.3
• CVE-2026-46121In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-46122In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-46123In the Linux kernel, the following vulnerability has been re…7.7
• CVE-2026-46124In the Linux kernel, the following vulnerability has been re…7.5
• CVE-2026-46125In the Linux kernel, the following vulnerability has been re…8.8
• CVE-2026-46126In the Linux kernel, the following vulnerability has been re…5.5