CVE-2026-5673

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.

CVSS v3 5.6 MEDIUM

5.6^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.3 / Impact : 4.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-5673	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2455340	Issue Tracking Third Party Advisory
https://github.com/xiph/theora/issues/24	Exploit Issue Tracking Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:xiph:theora:-:::::::*
	cpe:2.3:o:redhat:enterprise_linux:6.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:7.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:10.0:::::::*

History

No history.

Information

Published : 2026-04-06 10:16

Updated : 2026-06-17 10:59

NVD link : CVE-2026-5673

Mitre link : CVE-2026-5673

CVE.ORG link : CVE-2026-5673

JSON object : View

Products Affected

redhat

enterprise_linux

xiph

theora

CWE

CWE-125

Out-of-bounds Read

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