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Vulnerability · Published Feb 25, 2026 · Assigned by GitLab

CVE-2026-3203Buffer Over-read in Wireshark

Medium 5.5

In plain English

A medium-severity security flaw 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 9% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.2%top 91.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

RF4CE Profile protocol dissector crash in Wireshark 4.6.0 to 4.6.3 and 4.4.0 to 4.4.13 allows denial of service

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10wireshark1:4.4.2-4.el10_1.4ALSA-2026:9666
AlmaLinux:10wireshark-cli1:4.4.2-4.el10_1.4ALSA-2026:9666
AlmaLinux:10wireshark-devel1:4.4.2-4.el10_1.4ALSA-2026:9666
Alpine:v3.23wireshark4.6.4-r0ALPINE-CVE-2026-3203
Alpine:v3.24wireshark4.6.4-r0ALPINE-CVE-2026-3203
Debian:12wiresharkno fix listedDEBIAN-CVE-2026-3203
Debian:13wireshark4.4.14-0+deb13u1DEBIAN-CVE-2026-3203
Debian:14wireshark4.6.4-1DEBIAN-CVE-2026-3203
Rocky Linux:10wireshark1:4.4.2-4.el10_1.4RLSA-2026:9666
Ubuntu:24.04:LTSwiresharkno fix listedUBUNTU-CVE-2026-3203
Ubuntu:25.10wiresharkno fix listedUBUNTU-CVE-2026-3203
Ubuntu:26.04:LTSwiresharkno fix listedUBUNTU-CVE-2026-3203
Ubuntu:26.10wiresharkno fix listedUBUNTU-CVE-2026-3203

Affected products (as reported)

VendorProductVersions
Wireshark Foundation Wireshark 4.6.0 – before 4.6.44.4.0 – before 4.4.14

Weakness: CWE-126 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References