Debian/unbound: medium 5.3
NLnet Labs Unbound up to and including version 1.25.0 has a vulnerability in the DNSSEC validator where the code path to consult the negative cache for DS records does not take into account the limit
Action: Upgrade unbound to 1.25.1-1 or later.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 1.25.1-1 | - |
Fixed versions
| 1.25.1-1 |
Sources
- osv: DEBIAN-CVE-2026-42923#Debian:14/unbound
- https://security-tracker.debian.org/tracker/CVE-2026-42923
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