CVE-2026-6507

HIGH EPSS 37.9%

Published Apr 17, 20262mo ago · Modified Jun 17, 20261w ago

7.5 CVSS 3.1

High

Published Apr 17, 2026 2mo ago

Last Modified Jun 17, 2026 1w ago

Description

A flaw was found in dnsmasq. A remote attacker could exploit an out-of-bounds write vulnerability by sending a specially crafted BOOTREPLY (Bootstrap Protocol Reply) packet to a dnsmasq server configured with the `--dhcp-split-relay` option. This can lead to memory corruption, causing the dnsmasq daemon to crash and resulting in a denial of service (DoS).

CVSS Details

Base Score

7.5

Exploitability

3.9

Impact

3.6

Vector string

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector Network

Attack Complexity Low

Privileges Required None

User Interaction None

Scope Unchanged

Confidentiality None

Integrity None

Availability High

Threat Intelligence

EPSS Exploit Probability

37.9% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-787 Out-of-bounds Write Memory Safety

References 2

access.redhat.com https://access.redhat.com/security/cve/CVE-2026-6507
bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2459181

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.