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    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.

    Published:Apr 6, 2026
    Last Modified:May 1, 2026
    EPS:Apr 6, 2026
    EPSS Score:0.00005
    CVSS Score:5.6

    Affected Products

    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Xiph
    Product
    Libtheora
    Vendor
    Xiph
    Product
    Theora

    Exploits

    https://github.com/xiph/theora/issues/24

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High