Description
ntpd will crash if the server is not NTS-enabled (no certificate) and it receives an NTS-enabled client request (mode 3).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| NTPsec | ntpsec | 1.2.2 | — |
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 | ntpsec | 1.2.2+dfsg1-2 | — |
| Debian 13 | ntpsec | 1.2.2+dfsg1-2 | — |
| Debian 12 | ntpsec | 1.2.2+dfsg1-1+deb12u1 | DSA-5466-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | ntpsec | No fix yet | — |
| Ubuntu 20.04 LTS | ntpsec | No fix yet | — |
| Ubuntu 18.04 LTS | ntpsec | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | ntpsec | 1.2.2a-r0 | — |
| Alpine v3.23 | ntpsec | 1.2.2a-r0 | — |
| Alpine v3.22 | ntpsec | 1.2.2a-r0 | — |
| Alpine v3.21 | ntpsec | 1.2.2a-r0 | — |
| Alpine v3.20 | ntpsec | 1.2.2a-r0 | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | ntpsec | 1.2.2a-r0 | — |
| Alpine v3.18 | ntpsec | 1.2.2a-r0 | — |
Advisories 1
- DSA-5466-1 ntpsec - security update Debian Security (DSA / DLA) · Mar 9, 2026