dnspython is a DNS toolkit for Python. Prior to 2.9.0, dns.name.from_wire_parser follows attacker-controlled DNS compression pointer chains without a hop limit. A malicious DNS wire-format message can force excessive pointer traversal during name decompression, causing high CPU use, application degradation, or denial of service in applications that process untrusted DNS messages. This issue is fixed in version 2.9.0.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade python3-dns | Nov 8, 2026 | Nov 3, 2026 |
| Debian | — | Upgrade dnspython | Nov 12, 2026 | Oct 22, 2026 |
| Oracle_linux | — | Upgrade python3-dns | Nov 5, 2026 | Oct 22, 2026 |
| Redhat_linux | — | No solution existsUpgrade python3-dns | Oct 26, 2026 | Oct 22, 2026 |
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