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AlmaLinux 9 : wireshark (ALSA-2026:83546)

critical Nessus Plugin ID 366532

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Synopsis

The remote AlmaLinux host is missing one or more security updates.

Description

The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:83546 advisory.

 * 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 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)

Tenable has extracted the preceding description block directly from the AlmaLinux 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 affected wireshark, wireshark-cli and / or wireshark-devel packages.

See Also

https://access.redhat.com/errata/RHSA-2026:83546

https://errata.almalinux.org/9/ALSA-2026-83546.html

Plugin Details

Severity: Critical

ID: 366532

File Name: alma_linux_ALSA-2026-83546.nasl

Version: 1.1

Type: Local

Published: 10/16/2026

Updated: 10/16/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.41

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-2026-95387

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:alma:linux:9, cpe:/o:alma:linux:9::appstream, cpe:/o:alma:linux:9::baseos, cpe:/o:alma:linux:9::crb, cpe:/o:alma:linux:9::highavailability, cpe:/o:alma:linux:9::nfv, cpe:/o:alma:linux:9::realtime, cpe:/o:alma:linux:9::resilientstorage, cpe:/o:alma:linux:9::sap, cpe:/o:alma:linux:9::sap_hana, cpe:/o:alma:linux:9::supplementary, p-cpe:/a:alma:linux:wireshark-cli, p-cpe:/a:alma:linux:wireshark-devel, p-cpe:/a:alma:linux:wireshark

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/15/2026

Vulnerability Publication Date: 10/8/2024

Reference Information

CVE: CVE-2026-76880, CVE-2026-76886, CVE-2026-76919, CVE-2026-76927, CVE-2026-95387

CWE: 457, 476, 617, 787

RHSA: 2026:83546