Summary
The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver.
Security Fix(es):
* unbound: Unbound: DNS cache poisoning via UDP source port predictability (CVE-2026-50252)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Fixed packages 7
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux · 10 | python3-unbound | 1.24.2-7.el10_2.5 |
| AlmaLinux · 10 | unbound | 1.24.2-7.el10_2.5 |
| AlmaLinux · 10 | unbound-anchor | 1.24.2-7.el10_2.5 |
| AlmaLinux · 10 | unbound-devel | 1.24.2-7.el10_2.5 |
| AlmaLinux · 10 | unbound-dracut | 1.24.2-7.el10_2.5 |
| AlmaLinux · 10 | unbound-libs | 1.24.2-7.el10_2.5 |
| AlmaLinux · 10 | unbound-utils | 1.24.2-7.el10_2.5 |
Vulnerabilities 1
-
Medium 5.7
Possible cache poisoning attack by mapping source port population per thread
In NLnet Labs Unbound 1.4.22 up to and including 1.25.1, UDP source port is randomized and intended to serve as a secret value that increases the entropy of DNS transactions. When resolver load balancing policies depend on the source port while their outcome …