CVE-2026-2291 Details
Description
dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS.
A heap buffer overflow vulnerability has been identified in Dnsmasq's 'extract_name()' function. This vulnerability allows attackers to inject false entries into the DNS cache, potentially redirecting DNS queries to attacker-controlled IP addresses. Additionally, this exploitation can lead to a denial-of-service condition by causing Dnsmasq to crash or become unresponsive. The vulnerability affects Dnsmasq versions prior to 2.92rel2.
Dnsmasq has released version 2.92rel2 to address this vulnerability. Users should update 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 13, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
No weakness enumeration is available for this CVE.
Affected Products
No affected product data is available for this CVE.
Change History
7 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 20, 2026 | CVE Modified | CVE |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 13, 2026 | CVE Modified | CISA-ADP |
| May 11, 2026 | CVE Modified | [email protected] |
| May 11, 2026 | CVE Modified | [email protected] |
| May 11, 2026 | New CVE Received | [email protected] |