RHEL 10 : wireshark (RHSA-2026:84721)

critical Nessus Plugin ID 367289

Synopsis

The remote Red Hat host is missing one or more security updates for wireshark.

Description

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:84721 advisory.

The wireshark packages contain a network protocol analyzer used to capture and browse the traffic running on a computer network.

Security Fix(es):

* wireshark: Wireshark: Denial of Service via C12.22 protocol dissector crash (CVE-2026-76886)

* wireshark: Wireshark: Denial of Service via RRC protocol dissector out-of-bounds write (CVE-2026-76880)

* wireshark: Wireshark: Denial of Service vulnerability in ESS protocol dissector (CVE-2026-76919)

* wireshark: Wireshark: Denial of Service via C12.22 protocol dissector crash (CVE-2026-76879)

* wireshark: Wireshark: Denial of Service via X.509IF protocol dissector crash (CVE-2026-76928)

* wireshark: Wireshark: Denial of Service vulnerability in H.245 protocol dissector (CVE-2026-76927)

* wireshark: wireshark: Denial of Service via heap-based buffer overflow in SPDY dissector (CVE-2026-95387)

* wireshark: Heap-based Buffer Overflow in Wireshark (CVE-2026-95389)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL wireshark package based on the guidance in RHSA-2026:84721.

Plugin Details

Severity: Critical

ID: 367289

File Name: redhat-RHSA-2026-84721.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 10/19/2026

Updated: 10/19/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.41

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2026-95389

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS Score Source: CVE-2026-76886

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:10.2, p-cpe:/a:redhat:enterprise_linux:wireshark-cli, p-cpe:/a:redhat:enterprise_linux:wireshark-devel, p-cpe:/a:redhat:enterprise_linux:wireshark

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/19/2026

Vulnerability Publication Date: 10/8/2024

Reference Information

CVE: CVE-2026-76879, CVE-2026-76880, CVE-2026-76886, CVE-2026-76919, CVE-2026-76927, CVE-2026-76928, CVE-2026-95387, CVE-2026-95389

CWE: 122, 457, 476, 617, 787, 825

RHSA: 2026:84721

Detections

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