CVE-2026-4892 - Vulnerability Analysis
HighCVSS: 8.4Last Updated: May 12, 2026
dnsmasq - Remote Code Execution & Privilege Escalation
Published: May 11, 2026Updated: May 12, 2026
Overview
dnsmasq contains a heap-based out-of-bounds write vulnerability in DHCPv6 implementation, letting local attackers execute arbitrary code with root privileges via crafted DHCPv6 packets, exploit requires local access.
Severity & Score
Severity: High
CVSS Score: 8.4
Impact
Local attackers can execute arbitrary code with root privileges, leading to full system compromise.
Mitigation
Update dnsmasq to the latest version containing the fix.
References
- https://thekelleys.org.uk/dnsmasq/
- https://www.kb.cert.org/vuls/id/471747
- https://github.com/NixOS/nixpkgs/pull/519082
- https://github.com/NixOS/nixpkgs/pull/519093
- https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html
- https://thekelleys.org.uk/dnsmasq/CVE/
- https://github.com/pi-hole/FTL/releases/tag/v6.6.2
Related Resources
Details
- CVE ID
- CVE-2026-4892
- Severity
- High
- CVSS Score
- 8.4
- Type
- out_of_bounds_rw
- Status
- unconfirmed
CVSS Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H