Description
A double-free vulnerability in str2host.c in ldns 1.7.0 have unspecified impact and attack vectors.
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 | ldns | 1.7.0-4 | — |
| Debian 13 | ldns | 1.7.0-4 | — |
| Debian 12 | ldns | 1.7.0-4 | — |
| Debian 9 | ldns | 1.7.0-1+deb9u1 | DLA-2910-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | ldns | 1.6.17-8ubuntu0.1 | USN-3491-1 |
| Ubuntu 14.04 LTS | ldns | 1.6.17-1ubuntu0.1 | USN-3491-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | ldns | 1.7.0-4.3.1 | SUSE-SU-2020:0801-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.1 | ldns | 1.7.0-lp151.4.3.1 | openSUSE-SU-2020:0438-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | ldns | 1.7.0-r1 | — |
| Alpine v3.23 | ldns | 1.7.0-r1 | — |
| Alpine v3.22 | ldns | 1.7.0-r1 | — |
| Alpine v3.21 | ldns | 1.7.0-r1 | — |
| Alpine v3.20 | ldns | 1.7.0-r1 | — |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | ldns | 1.7.0-r1 | — |
| Alpine v3.18 | ldns | 1.7.0-r1 | — |
| Alpine v3.17 | ldns | 1.7.0-r1 | — |
| Alpine v3.16 | ldns | 1.7.0-r1 | — |
| Alpine v3.15 | ldns | 1.7.0-r1 | — |
| Alpine v3.14 | ldns | 1.7.0-r1 | — |
| Alpine v3.13 | ldns | 1.7.0-r1 | — |
| Alpine v3.12 | ldns | 1.7.0-r1 | — |
| Alpine v3.11 | ldns | 1.7.0-r1 | — |
| Alpine v3.10 | ldns | 1.7.0-r1 | — |
| Alpine v3.9 | ldns | 1.7.0-r1 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | ldns | 1.7.0-32 | — |
Advisories 4
- USN-3491-1 ldns vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-2910-1 ldns - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2020:0438-1 Security update for ldns SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0801-1 Security update for ldns SUSE / openSUSE Security Updates · Feb 4, 2026