CVE-2026-4893
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Summary
An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| dnsmasq | dnsmasq | 0 < 2.92rel2 | affected |
Weaknesses
- CWE-287: Improper Authentication
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
References
- https://www.kb.cert.org/vuls/id/471747
- https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html
- https://thekelleys.org.uk/dnsmasq/CVE/
- https://github.com/NixOS/nixpkgs/pull/519093
- https://github.com/NixOS/nixpkgs/pull/519082
- https://github.com/pi-hole/FTL/releases/tag/v6.6.2
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