CVE-2026-20339: ClamAV PESpin File Format Processing Integer Overflow Vulnerability
A vulnerability in the PESpin file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition or possibly other expanded impacts as a result of memory corruption on an affected device.
Other sources
ClamAV PESpin File Format Processing Integer Overflow Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 1.5.4-1 - Upgrade
Upgrade
debian/clamavto a version that resolves this vulnerability.Fixed in 1.4.6+dfsg-1
Event History
Frequently Asked Questions
What is the severity of CVE-2026-20339?
CVE-2026-20339 has a severity rating of high at 7.5.
How do I fix CVE-2026-20339?
To mitigate CVE-2026-20339, ensure that you update ClamAV to the latest version that includes the necessary patches.
What is the impact of CVE-2026-20339?
CVE-2026-20339 can lead to a denial of service condition or potentially other impacts due to memory corruption.
Who is affected by CVE-2026-20339?
Any user of ClamAV utilizing the PESpin file format parser is susceptible to CVE-2026-20339.
What type of vulnerability is CVE-2026-20339?
CVE-2026-20339 is categorized as an Integer Overflow vulnerability.