SB20260720320 - Out-of-bounds read in Linux kernel nfc nci

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Main Vulnerability Database SB20260720320

SB20260720320 - Out-of-bounds read in Linux kernel nfc nci

Published: July 20, 2026

Security Bulletin ID SB20260720320
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-2026-63915)

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 to cause a denial of service.

The vulnerability exists due to out-of-bounds read in HCP header parsing in nfc_hci_recv_from_llc() and nci_hci_data_received_cb() when processing a 0-byte HCP frame from an NFC peer. A remote attacker can send a malformed HCP frame to cause a denial of service.

A non-final fragmented 0-byte frame can also underflow the reassembly length to UINT_MAX and trigger skb_over_panic() during reassembly.


Remediation

Install update from vendor's website.

References