CVE-2026-20214: ClamAV FSG File Format Processing Out-of-Bounds Memory Corruption Vulnerability
A vulnerability in the FSG file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition, or possibly other expanded impacts, resulting from memory corruption on an affected device.
Other sources
ClamAV FSG File Format Processing Out-of-Bounds Memory Corruption Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/clamavto a version that resolves this vulnerability.Fixed in 1.4.5+dfsg-2 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 1.5.3-1
Event History
Frequently Asked Questions
What is the severity of CVE-2026-20214?
The severity of CVE-2026-20214 is high with a CVSS score of 7.5.
How do I fix CVE-2026-20214?
To fix CVE-2026-20214, update ClamAV to the latest version where the vulnerability has been patched.
What type of attack does CVE-2026-20214 enable?
CVE-2026-20214 allows an unauthenticated, remote attacker to potentially cause a denial-of-service condition due to memory corruption.
Which software is affected by CVE-2026-20214?
ClamAV is the affected software in the CVE-2026-20214 vulnerability.
What causes the vulnerability in CVE-2026-20214?
CVE-2026-20214 is caused by improper boundary checks for content in FSG files handled by ClamAV.