5.3

CVE-2023-26437: powerdns recursor Uncontrolled Resource Consumption

CVSS: 5.3v3.1MediumModified
AliasesopenSUSE-SU-2023:0101-1UBUNTU-CVE-2023-26437DEBIAN-CVE-2023-26437
Published 04-04-2023Last modified 13-02-2025
Open JSON

Vulnerability summary

CVE-2023-26437 is a medium (CVSS 5.3) Uncontrolled Resource Consumption vulnerability in powerdns recursor. EPSS estimates a 0.59% chance of exploitation in the next 30 days, higher than 47.5% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (NVD)
EPSS score
0.59%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2024:0048-1

Timeline

  1. 04-04-2023
    PublishedVulnerability first disclosed.
  2. 13-02-2025
    Last modifiedVulnerability information updated.

Description

Denial of service vulnerability in PowerDNS Recursor allows authoritative servers to be marked unavailable.This issue affects Recursor: through 4.6.5, through 4.7.4 , through 4.8.3.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.59%

Chance of exploitation in the next 30 days

Percentile

48%

Versus all other CVEs

30-day change

0.00 pp

From 0.59% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.59%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Opensuse2 products
  • pdns-recursor&distro=openSUSE Leap 15.4< 4.6.6-bp154.2.6.1
  • pdns-recursor&distro=openSUSE Tumbleweed< 4.8.4-1.1
Debian1 product
  • pdns-recursor< 4.8.4-1
Powerdns1 product
  • recursor≤ 4.6.5 | ≤ 4.7.4 | ≤ 4.8.3 | < 4.6.6 | ≥ 4.7.0, < 4.7.5 | ≥ 4.8.0, < 4.8.4
Suse1 product
  • pdns-recursor&distro=SUSE Package Hub 15 SP4< 4.6.6-bp154.2.6.1
Ubuntu1 product
  • pdns-recursorAll versions (No fix recorded)

5 vendors · 6 products

References

10 links