Threats Tagged 'cve-2026-20348'

This security update for ClamAV addresses multiple vulnerabilities including improper boundary checks, invalid memory frees, integer overflows and underflows, out-of-bounds reads/writes, path traversal, and thread-safety issues. These flaws affect various parsers such as ZIP, PESpin, GPT partition names, PDF hex strings, Mach-O files, XAR, and OneNote notebooks. The update also fixes issues related to NTFS alternate data stream handling on Windows and improves thread safety and resource management in the daemon and cryptographic components.

A vulnerability in the XAR file format parser of ClamAV allows an unauthenticated remote attacker to cause a denial-of-service (DoS) condition by triggering memory corruption during file scanning. The issue arises from improper boundary checks on XAR file content, which can cause the ClamAV scanning process to terminate unexpectedly.

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. This vulnerability is due to improper boundary checks for content in XAR files during scanning. An attacker could exploit this vulnerability by submitting a crafted file that contains XAR 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.