CVE-2026-6507

EUVD-2026-23419
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).
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 14%
Debian logo
Debian Releases
Debian Product
Codename
dnsmasq
bookworm
2.90-4~deb12u2
fixed
bookworm (security)
2.90-4~deb12u2
fixed
bullseye
2.85-1
fixed
bullseye (security)
2.85-1+deb11u1
fixed
forky
2.92-5
fixed
sid
2.92-5
fixed
trixie
2.91-1+deb13u1
fixed
trixie (security)
2.91-1+deb13u1
fixed
Common Weakness Enumeration
References
https://access.redhat.com/security/cve/CVE-2026-6507
https://bugzilla.redhat.com/show_bug.cgi?id=2459181