CVE-2026-5673

Severity CVSS v4.0:

Pending analysis

Type:

CWE-125 Out-of-bounds Read

Publication date:

06/04/2026

Last modified:

07/04/2026

Description

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.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.60 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): Required
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): None
Availability (A): High

Base Score 3.x

5.60

Severity 3.x

MEDIUM

CVE-2026-5673

Description

Impact

References to Advisories, Solutions, and Tools