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Linux Distros Unpatched Vulnerability : CVE-2026-52721

critical Nessus Plugin ID 321136

Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - Multiple out-of-bounds read vulnerabilities were found in GStreamer's pcapparse element. Malformed PCAP records can trigger reads beyond buffer boundaries during IPv4/TCP header parsing. This element is primarily used in debugging pipelines, limiting real-world exposure. A local attacker could trick a user into processing a specially crafted PCAP file, potentially leading to a crash or information disclosure.
 (CVE-2026-52721)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2026-52721

Plugin Details

Severity: Critical

ID: 321136

File Name: unpatched_CVE_2026_52721.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Misc.

Published: 6/15/2026

Updated: 6/15/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5.4

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

CVSS Score Source: CVE-2026-52721

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.3

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

Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:centos:centos:gstreamer1-plugins-bad-free-devel, p-cpe:/a:redhat:enterprise_linux:gstreamer-plugins-bad-free, cpe:/o:centos:centos:8, p-cpe:/a:redhat:enterprise_linux:gstreamer1-plugins-bad-free-libs, p-cpe:/a:centos:centos:gstreamer-plugins-bad-free-devel-docs, p-cpe:/a:redhat:enterprise_linux:gstreamer-plugins-bad-free-devel, cpe:/o:redhat:enterprise_linux:10, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:redhat:enterprise_linux:gstreamer-plugins-bad-free-devel-docs, p-cpe:/a:centos:centos:gstreamer1-plugins-bad-free-gtk, p-cpe:/a:redhat:enterprise_linux:gstreamer1-plugins-bad-free-gtk, cpe:/o:centos:centos:7, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:centos:centos:gstreamer-plugins-bad-free, p-cpe:/a:redhat:enterprise_linux:gstreamer1-plugins-bad-free, p-cpe:/a:centos:centos:gstreamer1-plugins-bad-free-libs, p-cpe:/a:redhat:enterprise_linux:gstreamer1-plugins-bad-free-devel, p-cpe:/a:centos:centos:gstreamer-plugins-bad-free-devel, p-cpe:/a:centos:centos:gstreamer1-plugins-bad-free

Required KB Items: Host/cpu, Host/local_checks_enabled, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 6/15/2026

Reference Information

CVE: CVE-2026-52721