Debian/dnsmasq: medium 5.3
A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.
Action: Upgrade dnsmasq to 2.91-1+deb13u1 or later.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 2.91-1+deb13u1 | - |
Fixed versions
| 2.91-1+deb13u1 |
Sources
- osv: DEBIAN-CVE-2026-4891#Debian:13/dnsmasq
- https://security-tracker.debian.org/tracker/CVE-2026-4891
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