Detections
Analytics
Linux Distros Unpatched Vulnerability : CVE-2026-5673
medium Nessus Plugin ID 305062
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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.- A flaw was found in libtheora. This heap-based out-of-bounds read vulnerability exists within the AVI (Audio Video Interleave) parser, specifically in the avi_parse_input_file() function. A local attacker could exploit this by tricking a user into opening a specially crafted AVI file containing a truncated header sub-chunk. This could lead to a denial-of-service (application crash) or potentially leak sensitive information from the heap. (CVE-2026-5673)
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-2026-5673
Plugin Details
Severity: Medium
ID: 305062
File Name: unpatched_CVE_2026_5673.nasl
Version: 1.5
Type: Local
Agent: unix
Family: Misc.
Published: 4/6/2026
Updated: 4/9/2026
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.0
CVSS v2
Risk Factor: Medium
Base Score: 5.2
Temporal Score: 4.4
Vector: CVSS2#AV:L/AC:L/Au:S/C:P/I:N/A:C
CVSS Score Source: CVE-2026-5673
CVSS v3
Risk Factor: Medium
Base Score: 5.6
Temporal Score: 5.1
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C
Vulnerability Information
CPE: cpe:/o:debian:debian_linux:14.0, cpe:/o:debian:debian_linux:13.0, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:debian:debian_linux:libtheora, cpe:/o:debian:debian_linux:11.0, cpe:/o:redhat:enterprise_linux:6, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, cpe:/o:redhat:enterprise_linux:10, p-cpe:/a:redhat:enterprise_linux:libtheora, p-cpe:/a:redhat:enterprise_linux:libtheora-devel, p-cpe:/a:redhat:enterprise_linux:theora-tools, p-cpe:/a:redhat:enterprise_linux:libtheora-devel-docs, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libtheora, p-cpe:/a:canonical:ubuntu_linux:mkvtoolnix, cpe:/o:canonical:ubuntu_linux:25.10, p-cpe:/a:canonical:ubuntu_linux:asc, p-cpe:/a:canonical:ubuntu_linux:ogmrip, cpe:/o:centos:centos:7, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:libtheora, p-cpe:/a:centos:centos:libtheora-devel, p-cpe:/a:centos:centos:theora-tools, p-cpe:/a:centos:centos:libtheora-devel-docs
Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier
Exploit Ease: No known exploits are available
Vulnerability Publication Date: 4/6/2026
Reference Information
CVE: CVE-2026-5673