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CVE-2021-45955

dnsmasq: heap-based buffer overflow in resize_packet

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Severity

Unknown

Red Hat Product Security

0

CVSS 3.1

Review impact separately from score.

Published · January 1, 2022

Updated · November 22, 2025

Description

A heap-based out-of-bounds WRITE flaw was found in dnsmasq. A remote attacker who can trigger a packet resize can use this flaw to write up to 50 bytes to the heap via a memmove call.

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 · 0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N

CWE-787 · Out-of-bounds Write