CVE-2026-5172
Publication date 11 May 2026
Last updated 14 May 2026
Ubuntu priority
Description
A buffer overflow in dnsmasq’s extract_addresses() function allows an attacker to trigger a heap out-of-bounds read and crash by exploiting a malformed DNS response, enabling extract_name() to advance the pointer past the record’s end.
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 |
Not affected
|
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Related Ubuntu Security Notices (USN)
- USN-8268-1
- Dnsmasq vulnerabilities
- 12 May 2026