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    CVE-2021-20304

    A flaw was found in OpenEXR's hufDecode functionality. This flaw allows an attacker who can pass a crafted file to be processed by OpenEXR, to trigger an undefined right shift error. The highest threat from this vulnerability is to system availability.

    Published:Feb 15, 2021
    Last Modified:Nov 21, 2024
    EPS:Aug 23, 2022
    EPSS Score:0.00118
    CVSS Score:7.5

    Affected Products

    Vendor
    Openexr
    Product
    Openexr

    Exploits

    https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26229https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26229

    Common Weakness Enumeration

    CWE-190 Integer Overflow or Wraparound

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

    Related CVEs

    CVE-2026-42217 (CVSS 6.3) — OpenEXR provides the specification and reference implementation of the EXR file format, an image storage forma…
    CVE-2026-42216 (CVSS 8.8) — OpenEXR provides the specification and reference implementation of the EXR file format, an image storage forma…
    CVE-2026-41142 (CVSS 8.8) — OpenEXR provides the specification and reference implementation of the EXR file format, an image storage forma…
    CVE-2026-40250 (CVSS 8.4) — OpenEXR provides the specification and reference implementation of the EXR file format, an image storage forma…
    CVE-2026-40244 (CVSS 8.4) — OpenEXR provides the specification and reference implementation of the EXR file format, an image storage forma…
    CVE-2026-39886 (CVSS 5.3) — OpenEXR provides the specification and reference implementation of the EXR file format, an image storage forma…
    CVE-2026-34589 (CVSS 8.4) — OpenEXR provides the specification and reference implementation of the EXR file format, an image storage forma…
    CVE-2026-34588 (CVSS 8.6) — OpenEXR provides the specification and reference implementation of the EXR file format, an image storage forma…
    CVE-2026-34380 (CVSS 5.9) — OpenEXR provides the specification and reference implementation of the EXR file format, an image storage forma…
    CVE-2026-34379 (CVSS 7.1) — OpenEXR provides the specification and reference implementation of the EXR file format, an image storage forma…

    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