CVE-2026-5673 MEDIUM

CVE-2026-5673: Libtheora: libtheora: denial of service or information disclosure via malformed avi file processing

Vendor Red Hat
Product Red Hat Enterprise Linux 10
Weakness CWE-125
Published April 6, 2026
Last update May 1, 2026

CVSS base score

5.6/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction Required
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 6, 2026 CVE published
May 1, 2026 Record updated