PT-2026-139857

CVE-2026-123576

Published

2026-11-08

Updated

2026-11-08

Description by

CVSS 4.0

8.7

High

MetricsAV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Hickory DNS versions 0.24.0 through 0.26.1

Description A memory exhaustion issue exists where remote attackers can consume server resources by sending incomplete DNS-over-QUIC request bodies. By opening numerous connections and sending only large length prefixes, attackers cause pre-allocated buffers to persist without timeout, leading to the exhaustion of server memory.

Recommendations Update Hickory DNS versions 0.24.0 through 0.26.1 to a version where this issue is resolved.

Exploitability

Exploit

Fix

Impacts

Researchers

Vendors

Affected products

Weakness enumeration

CWE-770: Allocation of Resources Without Limits or Throttling

Related identifiers

CVE-2026-123576