SB20261022159 - Out-of-bounds read in Linux kernel nfc st21nfca driver

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Main Vulnerability Database SB20261022159

SB20261022159 - Out-of-bounds read in Linux kernel nfc st21nfca driver

Published: October 22, 2026

Security Bulletin ID SB20261022159
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Adjecent network
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-98582)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker on the local network to trigger out-of-bounds reads that may cause a denial of service.

The vulnerability exists due to out-of-bounds reads in the Linux kernel's st21nfca_hci_i2c_repack() function when processing malformed received frames. A remote attacker on the local network can supply a frame with an EOF marker immediately after the start marker or a trailing escape marker to cause CRC processing or byte unstuffing to read beyond the received frame boundary, potentially causing a kernel crash.


Remediation

Install update from vendor's website.

References