The vulnerability of the vti6_tnl_lookup() function in the net/ipv6/ip6_vti.c module of the IPv6 protocol implementation in the Linux operating system allows a attacker to compromise the confidentiality, integrity, and accessibility of the protected information.

The vulnerability of the vti6tnllookup function in the net/ipv6/ip6vti.c module of the IPv6 protocol implementation in the Linux operating system is related to incorrect checking of the unsafe equivalence of input data. Exploiting this vulnerability may allow an attacker, acting remotely, to...

Unity Linux 20.1050e Security Update: kernel (UTSA-2026-099723)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-099723 advisory. In the Linux kernel, the following vulnerability has been resolved: ip6vti: fix incorrect tunnel matching in vti6tnllookup In vti6tnllookup, when an exact match for ...

Linux Distros Unpatched Vulnerability : CVE-2026-53221

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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...

CVE-2026-53221

A flaw was found in the Linux kernel, specifically within the ip6vti component responsible for managing IPv6 tunnels. This vulnerability arises from an error in the vti6tnllookup function, which incorrectly matches network tunnels by failing to properly verify wildcard addresses during fallback...

CVE-2026-53221

Linux kernel CVE-2026-53221 affects ip6_vti’s vti6_tnl_lookup() where, after an exact tunnel match fails, the fallback search for wildcard tunnels did not consistently verify that candidate tunnels actually have wildcard addresses. This mismatching happens because all tunnel types are stored in a...