CVE-2026-24030: powerdns dnsdist
Vulnerability summary
CVE-2026-24030 is a high (CVSS 7.5) vulnerability in powerdns dnsdist. EPSS estimates a 0.54% chance of exploitation in the next 30 days, higher than 44% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 4 · Related 4Timeline
- 31-03-2026PublishedVulnerability first disclosed.
- 31-03-2026Last modifiedVulnerability information updated.
Description
An attacker might be able to trick DNSdist into allocating too much memory while processing DNS over QUIC or DNS over HTTP/3 payloads, resulting in a denial of service. In setups with a large quantity of memory available this usually results in an exception and the QUIC connection is properly closed, but in some cases the system might enter an out-of-memory state instead and terminate the process.
CVSS metrics
4 scores · 4 sources · 1 version- CVE.orgCNA5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LDiffers
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.54%
Chance of exploitation in the next 30 days
Percentile
44%
Versus all other CVEs
30-day change
0.00 pp
From 0.54% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian1 product
- dnsdistAll versions (No fix recorded) | < 1.9.14-0+deb13u1 | < 2.0.3-1
Powerdns1 product
- dnsdist≥ 1.9.0, < 1.9.12 | ≥ 2.0.0, < 2.0.3
Ubuntu1 product
- dnsdistAll versions (No fix recorded)
3 vendors · 3 products
