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    2 vulnerabilities by MarlinFirmware

    CVE-2026-56111 (GCVE-0-2026-56111)

    Vulnerability from nvd – Published: 2026-06-24 14:31 – Updated: 2026-07-28 01:49 X_Open Source
    VLAI
    Title
    Marlin Firmware 2.1.2.7 Out-of-Bounds Write via M421 G-code Handler
    Summary
    Marlin Firmware through 2.1.2.7, fixed in commit 1f255d1, when built with MESH_BED_LEVELING enabled, contains an out-of-bounds write vulnerability in the M421 G-code handler that allows attackers to corrupt firmware memory by supplying out-of-range X and Y grid indices. Attackers can send a single crafted G-code command via USB serial, network interface, or malicious gcode file to write an attacker-controlled 32-bit float value past the z_values array bounds, corrupting adjacent firmware variables and causing denial of service or firmware state corruption.
    Severity
    8.3 (High)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
    9.1 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-24 15:52 UTC
    CWE
    • CWE-129 - Improper Validation of Array Index
    Assigner
    References
    Impacted products
    Vendor Product Version
    MarlinFirmware Marlin Affected: 0 , ≤ 2.1.2.7 (custom)
    Unaffected: 1f255d16ec2d456454fd444494cfb338d62b0fa1 (git)
        cpe:2.3:o:marlinfw:marlin_firmware:*:*:*:*:*:*:*:*
    		Create a notification for this product.
    Date Public
    2026-06-23 00:00
    Credits
    Christ Bouchuen
    Show details on NVD website
    To clipboard 

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    CVE-2026-56111 (GCVE-0-2026-56111)

    Vulnerability from cvelistv5 – Published: 2026-06-24 14:31 – Updated: 2026-07-28 01:49 X_Open Source
    VLAI
    Title
    Marlin Firmware 2.1.2.7 Out-of-Bounds Write via M421 G-code Handler
    Summary
    Marlin Firmware through 2.1.2.7, fixed in commit 1f255d1, when built with MESH_BED_LEVELING enabled, contains an out-of-bounds write vulnerability in the M421 G-code handler that allows attackers to corrupt firmware memory by supplying out-of-range X and Y grid indices. Attackers can send a single crafted G-code command via USB serial, network interface, or malicious gcode file to write an attacker-controlled 32-bit float value past the z_values array bounds, corrupting adjacent firmware variables and causing denial of service or firmware state corruption.
    Severity
    8.3 (High)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
    9.1 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-24 15:52 UTC
    CWE
    • CWE-129 - Improper Validation of Array Index
    Assigner
    References
    Impacted products
    Vendor Product Version
    MarlinFirmware Marlin Affected: 0 , ≤ 2.1.2.7 (custom)
    Unaffected: 1f255d16ec2d456454fd444494cfb338d62b0fa1 (git)
        cpe:2.3:o:marlinfw:marlin_firmware:*:*:*:*:*:*:*:*
    		Create a notification for this product.
    Date Public
    2026-06-23 00:00
    Credits
    Christ Bouchuen
    Show details on NVD website
    To clipboard 

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