CVE-2026-6676
Avira antivirus engine heap buffer OOB write when scanning a malformed POSIX tar archive
- State
- Published
- Severity
- 7.8 High
- Published
- Jun 12, 2026
- Updated
- Jun 15, 2026
- Reserved
- Apr 20, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.8 High | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | GEN |
Weaknesses
- CWE-787 Out-of-bounds Write
Affected Products
| Product | Versions |
|---|---|
Avira AntivirusGen Digital |
|
References
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