CVE-2025-59023

Crafted delegations or IP fragments can poison cached delegations in Recursor

8.2 HighFix available

Crafted delegations or IP fragments can poison cached delegations in Recursor.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: High
Availability: Low

Exploit likelihood

0.30%Up 0.3 points since Feb 10, 2026

What each source reports

CVE List Score used 8.2

Crafted delegations or IP fragments can poison cached delegations in Recursor

Crafted delegations or IP fragments can poison cached delegations in Recursor.

Record: CVE-2025-59023
CVSS 3.1: 8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Updated: 2026-11-02

EUVDEUVD-2025-207361 8.2

Crafted delegations or IP fragments can poison cached delegations in Recursor.

Record: EUVD-2025-207361
CVSS 3.1: 8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Updated: 2026-11-02

GitHub AdvisoriesGHSA-jgvp-6mmr-4mrw 8.2

Crafted delegations or IP fragments can poison cached delegations in Recursor.

Crafted delegations or IP fragments can poison cached delegations in Recursor.

Record: GHSA-jgvp-6mmr-4mrw
CVSS 3.1: 8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Weakness: CWE-294
Updated: 2026-11-02

NVD 8.2

Crafted delegations or IP fragments can poison cached delegations in Recursor.

Record: CVE-2025-59023
CVSS 3.1: 8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Weakness: CWE-294
Updated: 2026-11-02

OSVALPINE-CVE-2025-59023 8.2

Crafted delegations or IP fragments can poison cached delegations in Recursor.

Record: ALPINE-CVE-2025-59023
CVSS 3.1: 8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Updated: 2026-11-03

OSV 8.2

Crafted delegations or IP fragments can poison cached delegations in Recursor

Crafted delegations or IP fragments can poison cached delegations in Recursor.

Record: CVE-2025-59023
CVSS 3.1: 8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Updated: 2026-11-02

OSVDEBIAN-CVE-2025-59023 8.2

Crafted delegations or IP fragments can poison cached delegations in Recursor.

Record: DEBIAN-CVE-2025-59023
CVSS 3.1: 8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Updated: 2026-11-02

OSVUBUNTU-CVE-2025-59023 8.2

Crafted delegations or IP fragments can poison cached delegations in Recursor.

Record: UBUNTU-CVE-2025-59023
CVSS 3.1: 8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Updated: 2026-11-02

Affected products

powerdns recursor

Affected packages

Affected packages
Package	Affected	Fixed
`pdns-recursor` Alpine:v3.22	before 5.2.5-r0	5.2.5-r0
`pdns-recursor` Alpine:v3.23	before 5.3.0-r0	5.3.0-r0
`pdns-recursor` Alpine:v3.24	before 5.3.0-r0	5.3.0-r0
`pdns-recursor` Debian:12	All versions, plus listed versions 4.8.4-14.8.6-14.8.7-14.8.8-14.8.8-1+deb12u1 Show 45 moreShow less 4.9.0-14.9.0-24.9.1-14.9.1-24.9.1-34.9.1-44.9.2-14.9.2-24.9.3-14.9.4-14.9.5-15.0.5-15.0.7-15.0.7-25.0.9-15.1.3-15.1.3-25.2.0-15.2.0-25.2.0-35.2.0-45.2.0-55.2.1-15.2.2-15.2.2-25.2.4-15.2.4-25.2.5-15.3.0-15.3.0-25.3.0-35.3.0-45.3.0-55.3.1-15.3.3-15.3.4-15.3.4-25.3.5-15.4.0-15.4.1-15.4.1-25.4.2-15.4.2-25.4.3-15.4.4-1	None known
`pdns-recursor` Debian:13	before 5.2.6-0+deb13u1, plus listed versions 5.2.4-25.2.4-2+deb13u15.2.5-1	5.2.6-0+deb13u1
`pdns-recursor` Debian:14	before 5.3.1-1, plus listed versions 5.2.4-25.2.5-15.3.0-15.3.0-25.3.0-35.3.0-45.3.0-5	5.3.1-1
`pdns-recursor` Ubuntu:Pro:16.04:LTS	All versions, plus listed versions 3.7.3-14.0.0~alpha1-14.0.0~alpha1-24.0.0~alpha2-24.0.0~alpha2-2ubuntu0.14.0.0~alpha2-2ubuntu0.1+esm1	None known
`pdns-recursor` Ubuntu:Pro:18.04:LTS	All versions, plus listed versions 4.0.6-14.0.6-1build14.0.7-14.1.1-14.1.1-1build14.1.1-24.1.1-2ubuntu0.1~esm1	None known
`pdns-recursor` Ubuntu:Pro:20.04:LTS	All versions, plus listed versions 4.2.0-64.2.1-14.2.1-1build14.2.1-1build24.2.1-1ubuntu0.1~esm1	None known
`pdns-recursor` Ubuntu:Pro:22.04:LTS	All versions, plus listed versions 4.4.2-34.6.0-1ubuntu14.6.0-1ubuntu1+esm1	None known

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Affected packages
Package	Affected	Fixed
`pdns-recursor` Ubuntu:24.04:LTS	All versions, plus listed versions 4.9.0-24.9.1-44.9.2-14.9.2-1build14.9.2-24.9.3-14.9.3-1build24.9.3-1build3	None known
`pdns-recursor` Ubuntu:25.10	All versions, plus listed versions 5.2.0-55.2.2-15.2.2-25.2.4-25.2.4-2build2	None known
`pdns-recursor` Ubuntu:26.10	All versions, plus listed versions 5.3.5-15.4.3-15.4.5-1	None known
`pdns-recursor` Ubuntu:26.04:LTS	All versions, plus listed versions 5.2.4-2build25.3.1-15.3.3-15.3.4-15.3.4-1build15.3.4-25.3.5-1	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	affected, aliases, references	OSV
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-59023 is a high vulnerability (CVSS 8.2) in Powerdns Recursor, published October 29, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.30%, the 23rd percentile. Fixed in pdns-recursor 5.2.5-r0.

References

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