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Vulnerability · Published Apr 30, 2026 · Assigned by GitLab

CVE-2026-5405Heap-based Buffer Overflow in Wireshark

High 7.8

In plain English

A high-severity heap buffer overflow in Wireshark from Wireshark Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 94.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

RDP protocol dissector crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service and possible code execution

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10wireshark1:4.4.2-10.el10_2ALSA-2026:20600
AlmaLinux:10wireshark-cli1:4.4.2-10.el10_2ALSA-2026:20600
AlmaLinux:10wireshark-devel1:4.4.2-10.el10_2ALSA-2026:20600
Debian:12wireshark4.0.17-0+deb12u3DEBIAN-CVE-2026-5405
Debian:13wireshark4.4.15-0+deb13u1DEBIAN-CVE-2026-5405
Debian:14wireshark4.6.5-1DEBIAN-CVE-2026-5405
Rocky Linux:10wireshark1:4.4.2-10.el10_2RLSA-2026:20600
Ubuntu:24.04:LTSwiresharkno fix listedUBUNTU-CVE-2026-5405
Ubuntu:25.10wiresharkno fix listedUBUNTU-CVE-2026-5405
Ubuntu:26.04:LTSwiresharkno fix listedUBUNTU-CVE-2026-5405
Ubuntu:26.10wiresharkno fix listedUBUNTU-CVE-2026-5405

Affected products (as reported)

VendorProductVersions
Wireshark Foundation Wireshark 4.6.0 – before 4.6.54.4.0 – before 4.4.15

Weakness: CWE-122 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References