CVE-2026-27854
Use after free when parsing EDNS options in Lua
- State
- Published
- Severity
- 4.8 Medium
- Published
- Mar 31, 2026
- Updated
- Apr 2, 2026
- Reserved
- Feb 24, 2026
Description
An attacker might be able to trigger a use-after-free by sending crafted DNS queries to a DNSdist using the DNSQuestion:getEDNSOptions method in custom Lua code. In some cases DNSQuestion:getEDNSOptions might refer to a version of the DNS packet that has been modified, thus triggering a use-after-free and potentially a crash resulting in denial of service.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 4.8 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L | OX |
Weaknesses
- CWE-416 Use After Free
Affected Products
| Product | Versions |
|---|---|
DNSdistPowerDNS |
|
References
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