CVE Catalog

CVE-2026-5673

MediumCVSS 5.6
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.18%

8th percentile - higher than 8% of all known CVEs

Summary

libtheora contains a heap-based out-of-bounds read vulnerability in the AVI 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.

Risk Assessment

This could lead to a denial of service (application crash) or potentially leak sensitive information from the heap. Exploitation requires user interaction (opening a file).

Recommendation

Update libtheora to a version containing the fix. Avoid opening untrusted AVI files and consider sandboxing multimedia processing applications.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS