PT-2026-44243 · Linux · Linux Kernel
Published
2026-05-28
·
Updated
2026-07-14
·
CVE-2026-46120
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A slab-use-after-free occurs in the
ip6erspan changelink() function. The issue arises because the function uses dev net(dev) instead of the cached t->net, which causes the tunnel to be inserted into the incorrect per-netns hash after an IFLA NET NS FD migration. This results in a stale entry remaining in the original network namespace. When that namespace is destroyed, ip6gre exit rtnl net() processes the stale entry, leading to a kernel BUG in unregister netdevice many notify(). This can be reached by an unprivileged user namespace.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Linux Kernel