PT-2026-30592 · Libtheora · Libtheora

Breakingbad6 · Published 2026-04-06 · Updated 2026-04-06 · CVE-2026-5673

Positive Technologies · (AI Summary)

CVSS v3.1

5.6

Medium

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

Name of the Vulnerable Software and Affected Versions libtheora (affected versions not specified)

Description A heap-based out-of-bounds read flaw exists in libtheora's AVI (Audio Video Interleave) parser, specifically within the avi parse input file() function. A local attacker could exploit this by crafting a malicious AVI file with a truncated header sub-chunk. This could result in a denial-of-service (application crash) or potential information leakage from the heap.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-5673

Affected Products

Libtheora

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-5673 · Security Note
• https://github.com/xiph/theora/issues/24 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2455340 · Note
• https://twitter.com/VulmonFeeds/status/2041099890189652313 · Twitter Post
• https://twitter.com/CVEnew/status/2041094981104890343 · Twitter Post
• https://access.redhat.com/security/cve/CVE-2026-5673 · Note
• https://twitter.com/infoflowcloud/status/2041096213051621764 · Twitter Post