Debian/dnsmasq: medium 5.3
An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.
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-2026-4893#Debian:13/dnsmasq
- https://security-tracker.debian.org/tracker/CVE-2026-4893
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