CVE-2021-28855

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    CVE-2021-28855

    Published: 14 Apr 2021Last Modified: 9 Jul 2026

    Summary:

    Details: In Deark before 1.5.8, a specially crafted input file can cause a NULL pointer dereference in the dbuf_write function (src/deark-dbuf.c).

    References: https://github.com/fuzzing2026/CVE-PoCs/tree/main/deark-CVE-2021-28855, https://fatihhcelik.github.io/posts/NULL-Pointer-Dereference-Deark/, https://github.com/jsummers/deark/commit/287f5ac31dfdc074669182f51ece637706070eeb

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -fb671aa5d1b4317fabe5aab3e3713ca4b5798f95

    Affected versions

    v1.5.7
    v1.5.6
    v1.5.5

    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
    CVE-2021-28855 | CVE-DB