CVE-2026-6676 – Avira antivirus engine heap buffer OOB write when scanning a malformed POSIX tar archive

CVE ID :CVE-2026-6676

Published : June 12, 2026, 11:16 p.m. | 2 hours, 7 minutes ago

Description :Heap buffer out-of-bounds write vulnerability in Avira Antivirus engine when scanning a malformed POSIX tar archive may allow Local Execution of Code or Denial-of-Service of the antivirus engine process.

This issue affects Avira Antivirus on Windows, macOS, and Linux for engine builds before 8.3.27.12.

Severity: 7.8 | HIGH

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