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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-53221 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: ip6_vti: fix incorrect tunnel matching in vti6_tnl_lookup() In vti6_tnl_lookup(), 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 remote address wildcard remote). - Tunnels matching the packet's remote address, with any local address (wildcard local). However, vti6 stores all these different types of tunnels in the same hash table (ip6n->tnls_r_l) prone to hash collisions. The bug is that the fallback search loops in vti6_tnl_lookup() were missing checks to ensure that the candidate tunnel actually has a wildcard address.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/2abfb19bbb81958714ad1d43ebeb65b30394184b kernel.org
https://git.kernel.org/stable/c/2fc7bc087cc7085368263d9d37bfe9a0bddd6a2d kernel.org
https://git.kernel.org/stable/c/47fb3c2b4203556308e64354b3e78f2ce221d646 kernel.org
https://git.kernel.org/stable/c/90fd4513315ca07da99cfd8549d3e553a7160f0d kernel.org
https://git.kernel.org/stable/c/a5c0359f5cbc51a2e2b114d6041e0f3c73f903e9 kernel.org
https://git.kernel.org/stable/c/c327fa4fca31415431202e063767a7ae342e19c6 kernel.org
https://git.kernel.org/stable/c/f513f308cc4bdb4530d033431592ffbc29b7fca1 kernel.org
https://git.kernel.org/stable/c/fc657ac0767c49839b3ef0b08dc0953ca30883f8 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-53221
NVD Published Date:
06/25/2026
NVD Last Modified:
06/28/2026
Source:
kernel.org