CVE-2015-8899
dnsmasq: Denial-of-service when empty address from DNS overlays A record from hosts
Severity
LowRed Hat Product Security
CVSS 2.0
Review impact separately from score.
Published · November 14, 2015
Updated · June 27, 2026
Description
A NULL pointer dereference flaw was found in dmsmasq in the cache_insert() function. An attacker could exploit this flaw by locally defining an A or AAAA record in the /etc/hosts file that is not in the upstream server. When the upstream server sends a reply that the same name is empty, dmsmasq crashes (denial of service).
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 2.0 · 4.3AV:N/AC:M/Au:N/C:N/I:N/A:P
CWE-476 · NULL Pointer Dereference