SB2026092581 - Integer underflow in Linux kernel intel iwlwifi driver
Published: September 25, 2026
Security Bulletin ID
SB2026092581
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Integer underflow (CVE-ID: CVE-2026-93789)
CWE-ID: CWE-191 - Integer underflow
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 a length underflow.
The vulnerability exists due to improper validation of aligned TLV lengths in the iwlwifi firmware parser when processing malformed TLVs in a firmware image. A local user can cause the parser to process a firmware image containing malformed TLVs to cause a length underflow.
Remediation
Install update from vendor's website.