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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-53218 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_exthdr: fix register tracking for F_PRESENT flag nft_exthdr_init() passes user-controlled priv->len to nft_parse_register_store(), which marks that many bytes in the register bitmap as initialized. However, when NFT_EXTHDR_F_PRESENT is set, the eval paths write only 1 byte (nft_reg_store8) or 4 bytes (*dest = 0 on TCP/DCCP error path). When len > 4, registers beyond the first are never written, retaining uninitialized stack data from nft_regs. Bail out if userspace requests too much data when F_PRESENT is set.


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/19748967d59c31d24d21d40b728570788310b237 kernel.org
https://git.kernel.org/stable/c/46fc15a044e9938e7ea77786fb37edd2cd74f031 kernel.org
https://git.kernel.org/stable/c/67b27434c43b68a97becda98c9f0c8cf6cba2134 kernel.org
https://git.kernel.org/stable/c/772cecf198da732faebb5dcfc46d66a505be8495 kernel.org
https://git.kernel.org/stable/c/78069a6d8bc86c9e036eb82c2af4a19cc1871a53 kernel.org
https://git.kernel.org/stable/c/8738b1b6d0e639ca1fc0f61516afd3557ac4ecc6 kernel.org
https://git.kernel.org/stable/c/cd513e43b4b2bd1de39e2367bc4261c699a8652f kernel.org
https://git.kernel.org/stable/c/f08fb3d42fd3aad0b7a263da3ac3ebaf0845e265 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-53218
NVD Published Date:
06/25/2026
NVD Last Modified:
06/25/2026
Source:
kernel.org