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    CVE-2020-21817

    A null pointer dereference issue exists in GNU LibreDWG 0.10.2641 via htmlescape ../../programs/escape.c:29. which causes a denial of service (application crash).

    Published:May 17, 2021
    Last Modified:Nov 21, 2024
    EPS:May 17, 2021
    EPSS Score:0.00239
    CVSS Score:6.5

    Affected Products

    Vendor
    Gnu
    Product
    Libredwg

    Exploits

    https://github.com/LibreDWG/libredwg/issues/182#issue-547887727https://github.com/LibreDWG/libredwg/issues/182#issue-547887727

    Common Weakness Enumeration

    CWE-476 NULL Pointer Dereference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-9605 (CVSS 5.5) — A flaw has been found in GNU libredwg up to 0.13.4.8160. This issue affects the function bit_read_RC of the fi…
    CVE-2026-9530 (CVSS 1.9) — A weakness has been identified in GNU LibreDWG up to 0.14. The impacted element is the function read_2004_comp…
    CVE-2026-9529 (CVSS 1.9) — A security flaw has been discovered in GNU LibreDWG up to 0.14. The affected element is the function match_BLO…
    CVE-2026-9504 (CVSS 1.9) — A weakness has been identified in GNU LibreDWG up to 0.14. Affected is the function bit_convert_TU of the file…
    CVE-2026-9503 (CVSS 1.9) — A security flaw has been discovered in GNU LibreDWG up to 0.14. This impacts the function dwg_next_entity of t…
    CVE-2026-9502 (CVSS 1.9) — A vulnerability was identified in GNU LibreDWG up to 0.14. This affects the function decompress_R2004_section …
    CVE-2026-9501 (CVSS 1.9) — A vulnerability was determined in GNU LibreDWG up to 0.14. The impacted element is the function decompress_R20…

    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