Description
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.
Affected products
xiph: theora; redhat: enterprise linux
References3
- github.com/xiph/theora/issues/24 ExploitIssue TrackingThird Party Advisory
- access.redhat.com/security/cve/CVE-2026-5673 Third Party Advisory
- bugzilla.redhat.com/show_bug.cgi?id=2455340 Issue TrackingThird Party Advisory
Metrics
- CVSS 3.1
-
7.1
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H - EPSS — exploit probability
- 0% percentile: 8 · as of 12 November 2026
- CWE
- CWE-125
Could this be exploited in your environment?
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