SB20260720305 - Stack-based buffer overflow in Linux kernel iio chemical driver
Published: July 20, 2026
Security Bulletin ID
SB20260720305
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Stack-based buffer overflow (CVE-ID: CVE-2026-63932)
CWE-ID: CWE-121 - Stack-based buffer overflow
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local attacker to cause a denial of service.
The vulnerability exists due to a stack-based buffer overflow in mhz19b_receive_buf() when processing oversized serial replies. A local attacker can send an oversized serial reply to cause a denial of service.
Exploitation occurs before the command path validates the reply.
Remediation
Install update from vendor's website.