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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-43190 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_tcpmss: check remaining length before reading optlen Quoting reporter: In net/netfilter/xt_tcpmss.c (lines 53-68), the TCP option parser reads op[i+1] directly without validating the remaining option length. If the last byte of the option field is not EOL/NOP (0/1), the code attempts to index op[i+1]. In the case where i + 1 == optlen, this causes an out-of-bounds read, accessing memory past the optlen boundary (either reading beyond the stack buffer _opt or the following payload).


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.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/07a9b32eaae792ff7d0fcac14d8920c937c0a9c3 kernel.org
https://git.kernel.org/stable/c/5e13d0a37666955b6cfddc0f73cb40ed645b8a05 kernel.org
https://git.kernel.org/stable/c/735ee8582da3d239eb0c7a53adca61b79fb228b3 kernel.org
https://git.kernel.org/stable/c/8b300f726640c48c3edfe9c453334dd801f4b74e kernel.org
https://git.kernel.org/stable/c/cd5beda7e0e32865e214f28034bb92c1cecff885 kernel.org
https://git.kernel.org/stable/c/eaedc0bc18be46fe7f58170e967959a932c4f824 kernel.org
https://git.kernel.org/stable/c/f6c412dcfd76b0516d51aa847d8f4c7b70381b09 kernel.org
https://git.kernel.org/stable/c/f895191dc32c53eaf443b6443fe40945b2f92287 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-43190
NVD Published Date:
05/06/2026
NVD Last Modified:
05/08/2026
Source:
kernel.org