CVE-2026-2291
Publication date 11 May 2026
Last updated 13 May 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| dnsmasq | 26.04 LTS resolute |
Fixed 2.92-1ubuntu0.2
|
| 25.10 questing |
Fixed 2.91-1ubuntu0.2
|
|
| 24.04 LTS noble |
Fixed 2.90-2ubuntu0.3
|
|
| 22.04 LTS jammy |
Fixed 2.90-0ubuntu0.22.04.3
|
|
| 20.04 LTS focal |
Fixed 2.90-0ubuntu0.20.04.1+esm2
|
|
| 18.04 LTS bionic |
Fixed 2.90-0ubuntu0.18.04.1+esm3
|
|
| 16.04 LTS xenial |
Fixed 2.90-0ubuntu0.16.04.1+esm3
|
|
| 14.04 LTS trusty |
Fixed 2.68-1ubuntu0.2+esm5
|
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Related Ubuntu Security Notices (USN)
- USN-8268-1
- Dnsmasq vulnerabilities
- 12 May 2026