CVE-2026-123608

Public on 2026-11-08
Modified on 2026-11-11
Description
Hickory DNS hickory-proto from 0.3.1 before 0.26.1 contains a denial of service vulnerability in BinEncoder that allows remote attackers to exhaust CPU through quadratic-time name compression. Attackers can send malicious DNS messages with many records that add many candidate labels and trigger repeated linear scans during encoding, amplifying CPU exhaustion.
Severity
Important severity
Important
See what this means
CVSS v3 Base Score
7.5
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 2023 aardvark-dns Pending Fix
Amazon Linux 2027 Preview aardvark-dns Pending Fix
Amazon Linux 2 - Aws-nitro-enclaves-cli Extra aws-nitro-enclaves-cli Pending Fix
Amazon Linux 2023 aws-nitro-enclaves-cli Pending Fix
Amazon Linux 2027 Preview aws-nitro-enclaves-cli Pending Fix

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

FAQs regarding Amazon Linux ALAS/CVE Severity Red Hat: CVE-2026-123608 Mitre: CVE-2026-123608