CVE-2026-53221 ip6_vti: fix incorrect tunnel matching in vti6_tnl_lookup()

In the Linux kernel, the following vulnerability has been resolved: ip6vti: fix incorrect tunnel matching in vti6tnllookup In vti6tnllookup, when an exact match for a tunnel fails, the code falls back to searching for wildcard tunnels: - Tunnels matching the packet's local address, with any remot...

Unity Linux 20.1070a Security Update: kernel (UTSA-2026-013565)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-013565 advisory. In the Linux kernel, the following vulnerability has been resolved: ipv6: ensure sane device mtu in tunnels Another syzbot report 1 with no reproducer hints at a bug...

CVE-2026-23276 net: add xmit recursion limit to tunnel xmit functions

In the Linux kernel, the following vulnerability has been resolved: net: add xmit recursion limit to tunnel xmit functions Tunnel xmit functions iptunnelxmit, ip6tunnelxmit lack their own recursion limit. When a bond device in broadcast mode has GRE tap interfaces as slaves, and those GRE tunnels...

EUVD-2022-55882

In the Linux kernel, the following vulnerability has been resolved: ipv6: ensure sane device mtu in tunnels Another syzbot report 1 with no reproducer hints at a bug in ip6gre tunnel dev:ip6gretap0 Since ipv6 mcast code makes sure to read dev-mtu once and applies a sanity check on it see commit...

Linux Distros Unpatched Vulnerability : CVE-2022-50816

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ipv6: ensure sane device mtu in tunnels Another syzbot report 1 with no reproducer hints at a bug in ip6gre tunnel dev:ip6gretap0 Since ipv6 mcast code makes su...

AZL-62544 CVE-2025-21768 affecting package kernel 6.6.157.1-1

In the Linux kernel, the following vulnerability has been resolved: net: ipv6: fix dst ref loops in rpl, seg6 and ioam6 lwtunnels Some lwtunnels have a dst cache for post-transformation dst. If the packet destination did not change we may end up recording a reference to the lwtunnel in its own...

PT-2022-34880

Name of the Vulnerable Software and Affected Versions Linux Kernel versions prior to v6.0.7 Description The issue concerns the handling of device MTU in IPv6 tunnels. It was introduced in version v3.7 and fixed in version v6.0.7. The actual impact and attack plausibility have not yet been proven...