CVE-2026-6507CWE-787

CVE-2026-6507

High · published April 17, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
47.0
In the wild
Unconfirmed
What it is

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).

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00582 · 47.0th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-04-17T17:16Z
References (2)
https://access.redhat.com/security/cve/CVE-2026-6507 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2459181 · [email protected]
EPSS history
Timeline
  • 17 APR 12:23Z
    Dnsmasq: dnsmasq: denial of service due to out-of-bounds write in dhcp bootreply processing
    cvelistv5