SB20260625280 - Fedora 44 update for pdns-recursor

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Main Vulnerability Database SB20260625280

SB20260625280 - Fedora 44 update for pdns-recursor

Published: June 25, 2026

Security Bulletin ID SB20260625280
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 vulnerabilities.


1) Resource management error (CVE-ID: CVE-2025-59029)

CWE-ID: CWE-399 - Resource Management Errors

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper management of internal resources in cache management when handling DNS queries with with qtype ANY. A remote attacker can send specially crafted request to the DNS server and perform a denial of service (DoS) attack.


2) Insufficient verification of data authenticity (CVE-ID: CVE-2025-59023)

CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to poison DNS cache. 

The vulnerability exists due to software does not apply strict enough validation of received delegation information. A remote attacker can spoof delegation requests and poison DNS cache of the server. 


3) Insufficient verification of data authenticity (CVE-ID: CVE-2025-59024)

CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to poison DNS cache. 

The vulnerability exists due to software does not apply strict enough validation of received delegation information. A remote attacker can use an UDP IP fragments attack to poison DNS cache of the server. 


4) Resource exhaustion (CVE-ID: CVE-2026-0398)

CWE-ID: CWE-400 - Resource exhaustion

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources. A remote attacker can trigger memory exhaustion by publishing and querying a crafted zone.


Remediation

Install update from vendor's website.

References