CVE-2026-43291 HIGH

CVE-2026-43291: net: nfc: nci: Fix parameter validation for packet data

Vendor Linux
Product Linux
Published May 8, 2026
Last update May 23, 2026

CVSS base score

8.3/10
Attack vector Adjacent
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity Low

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H

What the vulnerability does

01Description

In the Linux kernel, the following vulnerability has been resolved: net: nfc: nci: Fix parameter validation for packet data Since commit 9c328f54741b ("net: nfc: nci: Add parameter validation for packet data") communication with nci nfc chips is not working any more. The mentioned commit tries to fix access of uninitialized data, but failed to understand that in some cases the data packet is of variable length and can therefore not be compared to the maximum packet length given by the sizeof(struct).

Key dates

02Disclosure timeline

May 8, 2026 CVE published
May 23, 2026 Record updated