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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.

PUBLISHED Reserved 2026-04-20 | Published 2026-06-12 | Updated 2026-06-12 | Assigner GEN




HIGH: 7.8CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Problem types

CWE-787 Out-of-bounds Write

Product status

Default status
affected

Any version before 8.3.27.12
affected

Credits

Mike Zhang, an independent security researcher reporter

References

www.gendigital.com/us/en/contact-us/security-advisories/

cve.org (CVE-2026-6676)

nvd.nist.gov (CVE-2026-6676)

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