CVE-2020-26419
wireshark: multiple dissector memory leaks (wnpa-sec-2020-19)
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · December 9, 2020
Updated · November 22, 2025
Description
A memory leak was discovered in Wireshark while decoding packets captured in a pcap file or coming from the network. Multiple packet dissectors are potentially affected by this issue. A remote attacker may abuse this flaw by sending specially crafted packets that, when processed, would make Wireshark consume excessive CPU resources resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Statement
This issue does not affect the versions of wireshark as shipped with Red Hat Enterprise Linux 5, 6, 7, and 8, as the vulnerable code was introduced in a newer version of the package.
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 · 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-401 · Missing Release of Memory after Effective Lifetime