CVE-2026-5673
highA flaw was found in libtheora.
Vendor / product: Xiph — theora
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
7.1
7.1 (CVSS v3.1)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-04-06 10:16
Modified: 2026-11-05 22:18
NVD status: Analyzed
Last synced 1 hour ago
Verified against the source API 2026-11-05 22:23 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
xiph / theora all versions
redhat / enterprise_linux 6.0, 7.0, 8.0, 9.0, 10.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://access.redhat.com/security/cve/CVE-2026-5673 secalert@redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2455340 secalert@redhat.com
- https://github.com/xiph/theora/issues/24 secalert@redhat.com
Data sources
NVD CVE API 2.0 — fetched 2026-11-05 22:23 UTC · record ↗