CVE-2026-4890 Details
Description
A Denial of Service (DoS) vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.
A denial-of-service vulnerability has been identified in dnsmasq's DNSSEC validation process. This vulnerability allows remote attackers to cause the dnsmasq process to enter an infinite loop, leading to a denial-of-service condition. The issue arises from the improper handling of crafted DNS packets, which can cause the dnsmasq service to become unresponsive.
dnsmasq has released version 2.92rel2 to address this vulnerability. Users should upgrade to this version.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 11, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-835 | Loop with Unreachable Exit Condition ('Infinite Loop') | redhat-SADP |
Affected Products
No affected product data is available for this CVE.
Change History
12 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 25, 2026 | CVE Modified | redhat-SADP |
| Aug 24, 2026 | CVE Modified | redhat-SADP |
| Jul 23, 2026 | CVE Modified | redhat-SADP |
| Jul 15, 2026 | CVE Modified | redhat-SADP |
| Jul 2, 2026 | CVE Modified | redhat-SADP |
| Jun 30, 2026 | CVE Modified | redhat-SADP |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 17, 2026 | CVE Modified | [email protected] |
| May 11, 2026 | CVE Modified | [email protected] |
| May 11, 2026 | CVE Modified | CISA-ADP |
| May 11, 2026 | CVE Modified | [email protected] |
| May 11, 2026 | New CVE Received | [email protected] |