Description
Dnsmasq before 2.76 allows remote servers to cause a denial of service (crash) via a reply with an empty DNS address that has an (1) A or (2) AAAA record defined locally.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | dnsmasq | 2.76-1 | — |
| Debian 13 | dnsmasq | 2.76-1 | — |
| Debian 12 | dnsmasq | 2.76-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | dnsmasq | 2.75-1ubuntu0.16.04.1 | USN-3009-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | dnsmasq | 2.71-13.1 | SUSE-SU-2016:3269-1 |
| SLES 12 SP1 | dnsmasq | 2.71-13.1 | SUSE-SU-2016:3269-1 |
| SLES 12 | dnsmasq | 2.78-6.6.1 | SUSE-SU-2017:2616-1 |
| SLES 11 SP4 | dnsmasq | 2.71-0.16.3 | SUSE-SU-2017:2619-1, SUSE-SU-2016:3199-1 |
| SLES 11 SP3 | dnsmasq | 2.78-0.16.5.1 | SUSE-SU-2017:2617-1 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP2 | dnsmasq | 2.71-13.1 | SUSE-SU-2016:3269-1 |
| SLES for SAP 12 SP1 | dnsmasq | 2.71-13.1 | SUSE-SU-2016:3269-1 |
| SLES for SAP 11 SP4 | dnsmasq | 2.71-0.16.3 | SUSE-SU-2017:2619-1, SUSE-SU-2016:3199-1 |
| SUSE OpenStack Cloud 6 | dnsmasq | 2.71-13.1 | SUSE-SU-2016:3269-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | dnsmasq | 2.78-0.16.5.1 | SUSE-SU-2017:2617-1 |
| SUSE Cloud Compute Node for SUSE Linux Enterprise 12 | dnsmasq | 2.71-6.3.1 | SUSE-SU-2016:3257-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | dnsmasq | 2.76-1.3 | openSUSE-SU-2024:10195-1 |
Advisories 8
- USN-3009-1 dnsmasq vulnerability Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2017:2617-1 Security update for dnsmasq SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2619-1 Security update for dnsmasq SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:3269-1 Security update for dnsmasq SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:3199-1 Security update for dnsmasq SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10195-1 dnsmasq-2.76-1.3 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:3257-1 Security update for dnsmasq SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2616-1 Security update for dnsmasq SUSE / openSUSE Security Updates · May 2, 2025
References
- 91031 vdb-entry
- [Dnsmasq-discuss] 20160418 Dnsmasq 2.75 on Ubuntu 16.04 crashes reproducibly mailing-list
- USN-3009-1 vendor-advisory
- [Dnsmasq-discuss] 20160503 Dnsmasq 2.75 on Ubuntu 16.04 crashes reproducibly mailing-list
- [oss-security] 20160603 Re: CVE Request: Dnsmasq denial of service mailing-list
- 1036045 vdb-entry
- http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=41a8d9e99be9f2cc8b02051dd322cb45e0faac87
- [oss-security] 20160603 CVE Request: Dnsmasq denial of service mailing-list