SB20261007128 - Out-of-bounds read in Linux kernel wwan t7xx driver

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20261007128

SB20261007128 - Out-of-bounds read in Linux kernel wwan t7xx driver

Published: October 7, 2026

Security Bulletin ID SB20261007128
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-98238)

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

CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause an out-of-bounds read and invalid pointer dereference.

The vulnerability exists due to an out-of-bounds read in t7xx_ccmni_recv_skb() when processing a DPMAIF PIT header containing an unchecked netif index. A local user can set the netif index to a value between 21 and 31 to cause an out-of-bounds read and invalid pointer dereference.

The out-of-bounds array access reaches an adjacent callback table containing non-null values, which are subsequently interpreted as pointers to struct t7xx_ccmni.


Remediation

Install update from vendor's website.

References