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    CVE-2019-20056

    stb_image.h (aka the stb image loader) 2.23, as used in libsixel and other products, has an assertion failure in stbi__shiftsigned.

    Published:Dec 29, 2019
    Last Modified:Nov 21, 2024
    EPS:Dec 29, 2019
    EPSS Score:0.00468
    CVSS Score:6.5

    Affected Products

    Vendor
    Nothings
    Product
    Stb Image.h

    Exploits

    https://github.com/saitoha/libsixel/issues/126https://github.com/saitoha/libsixel/issues/126

    Common Weakness Enumeration

    CWE-617 Reachable Assertion

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2025-3407 (CVSS 5.3) — A vulnerability was found in Nothings stb up to f056911. It has been declared as critical. Affected by this vu…
    CVE-2025-3406 (CVSS 5.3) — A vulnerability was found in Nothings stb up to f056911. It has been classified as problematic. Affected is th…
    CVE-2023-43281 (CVSS 6.5) — Double Free vulnerability in Nothings Stb Image.h v.2.28 allows a remote attacker to cause a denial of service…
    CVE-2023-45667 (CVSS 5.3) — stb_image is a single file MIT licensed library for processing images. If `stbi__load_gif_main` in `stbi_load…
    CVE-2023-45666 (CVSS 7.3) — stb_image is a single file MIT licensed library for processing images. It may look like `stbi__load_gif_main`…
    CVE-2023-45664 (CVSS 7.3) — stb_image is a single file MIT licensed library for processing images. A crafted image file can trigger `stbi_…
    CVE-2023-45663 (CVSS 5.3) — stb_image is a single file MIT licensed library for processing images. The stbi__getn function reads a specifi…
    CVE-2023-45662 (CVSS 6.5) — stb_image is a single file MIT licensed library for processing images. When `stbi_set_flip_vertically_on_load`…

    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