CVE-2026-20348: ClamAV XAR File Format Processing Memory Corruption Vulnerability
A vulnerability in the XAR 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 XAR File Format Processing Memory Corruption 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-2026-20348?
CVE-2026-20348 has a severity rating of 7.5, classified as high.
How do I fix CVE-2026-20348?
To fix CVE-2026-20348, update ClamAV to the latest version where this vulnerability is patched.
What impact does CVE-2026-20348 have on systems?
CVE-2026-20348 can lead to a denial of service (DoS) condition or potentially other expanded impacts due to memory corruption.
Who is affected by CVE-2026-20348?
All users running affected versions of ClamAV that utilize the XAR file format parser are at risk due to CVE-2026-20348.
Can CVE-2026-20348 be exploited remotely?
Yes, CVE-2026-20348 can be exploited by an unauthenticated remote attacker.