Description
A vulnerability was found in the implementation of DNSSEC in Dnsmasq up to and including 2.78. Wildcard synthesized NSEC records could be improperly interpreted to prove the non-existence of hostnames that actually exist.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Simon Kelley | dnsmasq | up to and including 2.78 | — |
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 | 2.79-1 | — |
| Debian 13 | dnsmasq | 2.79-1 | — |
| Debian 12 | dnsmasq | 2.79-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | dnsmasq | 2.75-1ubuntu0.16.04.10 | USN-4924-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | dnsmasq | 2.78-7.3.1 | SUSE-SU-2019:3189-1 |
| SLES 15 | dnsmasq | 2.78-3.8.1 | SUSE-SU-2019:3188-1 |
| SLES 12 SP4 | dnsmasq | 2.78-18.6.1 | SUSE-SU-2019:1721-1 |
| SLES 12 SP3 | dnsmasq | 2.78-18.6.1 | SUSE-SU-2019:1721-1 |
| SLES 11 SP4 | dnsmasq | 2.78-0.17.10.1 | SUSE-SU-2019:14190-1 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP4 | dnsmasq | 2.78-18.6.1 | SUSE-SU-2019:1721-1 |
| SLES for SAP 12 SP3 | dnsmasq | 2.78-18.6.1 | SUSE-SU-2019:1721-1 |
| SUSE OpenStack Cloud Crowbar 8 | dnsmasq | 2.78-18.6.1 | SUSE-SU-2019:1721-1 |
| SUSE OpenStack Cloud 8 | dnsmasq | 2.78-18.6.1 | SUSE-SU-2019:1721-1 |
| SUSE OpenStack Cloud 7 | dnsmasq | 2.78-18.6.1 | SUSE-SU-2019:1721-1 |
| SUSE HPE Helion OpenStack 8 | dnsmasq | 2.78-18.6.1 | SUSE-SU-2019:1721-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | dnsmasq | 2.86-1.1 | openSUSE-SU-2024:10721-1 |
| openSUSE Leap 15.1 | dnsmasq | 2.78-lp151.5.3.1 | openSUSE-SU-2019:2669-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | dnsmasq | 2.79-r0 | — |
| Alpine v3.23 | dnsmasq | 2.79-r0 | — |
| Alpine v3.22 | dnsmasq | 2.79-r0 | — |
| Alpine v3.21 | dnsmasq | 2.79-r0 | — |
| Alpine v3.20 | dnsmasq | 2.79-r0 | — |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | dnsmasq | 2.79-r0 | — |
| Alpine v3.18 | dnsmasq | 2.79-r0 | — |
| Alpine v3.17 | dnsmasq | 2.79-r0 | — |
| Alpine v3.16 | dnsmasq | 2.79-r0 | — |
| Alpine v3.15 | dnsmasq | 2.79-r0 | — |
| Alpine v3.14 | dnsmasq | 2.79-r0 | — |
| Alpine v3.13 | dnsmasq | 2.79-r0 | — |
| Alpine v3.12 | dnsmasq | 2.79-r0 | — |
| Alpine v3.11 | dnsmasq | 2.79-r0 | — |
| Alpine v3.10 | dnsmasq | 2.79-r0 | — |
| Alpine v3.9 | dnsmasq | 2.79-r0 | — |
| Alpine v3.8 | dnsmasq | 2.79-r0 | — |
| Alpine v3.7 | dnsmasq | 2.78-r2 | — |
| Alpine v3.6 | dnsmasq | 2.76-r6 | — |
| Alpine v3.5 | dnsmasq | 2.76-r3 | — |
Advisories 7
- USN-4924-1 dnsmasq vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2019:3188-1 Security update for dnsmasq SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:3189-1 Security update for dnsmasq SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1721-1 Security update for dnsmasq SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:14190-1 Security update for dnsmasq SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10721-1 dnsmasq-2.86-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:2669-1 Security update for dnsmasq SUSE / openSUSE Security Updates · Feb 4, 2026
References
- [dnsmasq-discuss] 20180119 DNSSEC security fix. mailing-list
- 102812 vdb-entry
- openSUSE-SU-2019:2669 vendor-advisory