CVE-2026-20243

Name
CVE-2026-20243
Description
A vulnerability in the ALZ 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. This vulnerability is due to improper boundary checks for content in ALZ files during scanning, which may result in an out-of-bounds buffer write. An attacker could exploit this vulnerability by submitting a crafted file that contains ALZ content to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software.
NVD Severity
unknown
Other trackers
Mailing lists
Exploits
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
psirt@cisco.com https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-88cFYyxR

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:macos:*:* secure_endpoint >= None < 1.27.2
cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:linux:*:* secure_endpoint >= None < 1.29.0
cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:windows:*:* secure_endpoint >= None < 8.6.2

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
clamav edge-community 1.4.5-r0 Carlo Landmeter <clandmeter@alpinelinux.org> fixed
clamav 3.24-community 1.4.5-r0 Carlo Landmeter <clandmeter@alpinelinux.org> fixed