CVE-2026-2291: exploitation status and patch state

CVE-2026-2291 · patch available

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.

Is CVE-2026-2291 exploited?

• Not in the CISA KEV catalog.
• Public exploit code: none found in monitored sources.

Which products and versions are affected?

No affected package list recorded here yet.

Is there a patch?

• CBL-Mariner Releases

What PlainSec published about CVE-2026-2291

• dnsmasq Flaws Span DNS Poisoning and Local Root (2026-05-13)

Primary sources

• NVD record

What this record does not say

• No CVSS score from NVD.
• No EPSS score.
• No affected package data.

KEV and EPSS are re-checked daily. Record last updated 2026-08-11.