Out-of-bounds write in ClamAV - CVE-2026-20345
Published: August 7, 2026
Vulnerability identifier: #VU141297
CSH Severity: Medium
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-20345
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to read or write beyond a stack-allocated partition entry.
The vulnerability exists due to out-of-bounds read and out-of-bounds write in GPT partition name conversion when parsing partition names. A remote attacker can provide a crafted GPT structure to read or write beyond a stack-allocated partition entry.
Affected software
ClamAV
How to mitigate CVE-2026-20345
Install security update from vendor's website.
ClamAV - addressed in versions 1.4.6, 1.5.4