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Fencer Vulns
high 7.8

CVE-2026-5405 json

Heap-based Buffer Overflow in Wireshark

published 2026-04-30 6 mo ago modified 2026-10-26 14 d ago also EUVD-2026-26462

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 5%
public exploits
0
none known

Summary

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

Patch / fix

  • Wireshark Foundation Wireshark 4.4.15, 4.6.5
  • Red Hat Red Hat Enterprise Linux 10 1:4.4.2-10.el10_2
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 1:4.4.2-3.el10_0.4
  • wireshark Debian 12 4.0.17-0+deb12u3
  • wireshark Debian 13 4.4.15-0+deb13u1
  • wireshark Debian 14 4.6.5-1

debian advisories DEBIAN-CVE-2026-5405

  • wireshark RHEL 10.2 1:4.4.2-10.el10_2
  • wireshark-cli RHEL 10.2 1:4.4.2-10.el10_2
  • wireshark enterprise linux eus 10.0 1:4.4.2-3.el10_0.4
  • wireshark-cli enterprise linux eus 10.0 1:4.4.2-3.el10_0.4

red hat advisories RHSA-2026:26182RHSA-2026:20600

  • wireshark SLE Module for Desktop Applications 15 SP7, SLE Module for Basesystem 15 SP7 4.6.7-150700.21.11.1
  • wireshark SLES for SAP 15 SP6, SLES 15 SP6-LTSS 4.2.14-150600.18.41.1

suse advisories SUSE-SU-2026:3501-1SUSE-SU-2026:2437-1

  • wireshark openSUSE Tumbleweed 4.6.5-1.1

opensuse advisories openSUSE-SU-2026:10686-1

  • wireshark AlmaLinux 10 1:4.4.2-10.el10_2
  • wireshark-cli AlmaLinux 10 1:4.4.2-10.el10_2

almalinux advisories ALSA-2026:20600

  • wireshark Rocky Linux 10 1:4.4.2-10.el10_2

rocky linux advisories RLSA-2026:20600

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-5405 updated cvss 7.8

wireshark: Heap-based Buffer Overflow in Wireshark

  • Red Hat Enterprise Linux AppStream (v. 10) wireshark 4.4.2-10.el10_2, wireshark-cli 4.4.2-10.el10_2
    fixed: vendor fix RHSA-2026:20600
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) wireshark 4.4.2-3.el10_0.4, wireshark-cli 4.4.2-3.el10_0.4
    fixed: vendor fix RHSA-2026:26182
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) wireshark-devel 4.4.2-10.el10_2, wireshark-debuginfo 4.4.2-10.el10_2, wireshark-debugsource 4.4.2-10.el10_2, wireshark-cli-debuginfo 4.4.2-10.el10_2
    fixed: vendor fix RHSA-2026:20600
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) wireshark-devel 4.4.2-3.el10_0.4, wireshark-debuginfo 4.4.2-3.el10_0.4, wireshark-debugsource 4.4.2-3.el10_0.4, wireshark-cli-debuginfo 4.4.2-3.el10_0.4
    fixed: vendor fix RHSA-2026:26182
  • Red Hat Enterprise Linux 6 wireshark, wireshark-gnome Red Hat Enterprise Linux 7 wireshark, wireshark-gnome Red Hat Enterprise Linux 8 wireshark, wireshark-cli Red Hat Enterprise Linux 9 wireshark, wireshark-cli
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
6 mo ago

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • gitlab.com https://gitlab.com/wireshark/wireshark/-/issues/21105 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CISA ADP 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • Wireshark Foundation Wireshark
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.