CVE-2021-45951
dnsmasq: a heap-based buffer overflow in check_bad_address
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · January 1, 2022
Updated · November 21, 2025
Description
Dnsmasq 2.86 has a heap-based buffer overflow in check_bad_address (called from check_for_bogus_wildcard and FuzzCheckForBogusWildcard). NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real vulnerabilities, to the best of our knowledge.
Statement
Red Hat Product Security does not consider this to be a vulnerability.
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 3.1 · 0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N
CWE-787 · Out-of-bounds Write