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    2 vulnerabilities by harfbuzz

    CVE-2026-22693 (GCVE-0-2026-22693)

    Vulnerability from cvelistv5 – Published: 2026-01-10 05:53 – Updated: 2026-01-12 16:47
    VLAI
    Title
    Null Pointer Dereference in SubtableUnicodesCache::create leading to DoS
    Summary
    HarfBuzz is a text shaping engine. Prior to version 12.3.0, a null pointer dereference vulnerability exists in the SubtableUnicodesCache::create function located in src/hb-ot-cmap-table.hh. The function fails to check if hb_malloc returns NULL before using placement new to construct an object at the returned pointer address. When hb_malloc fails to allocate memory (which can occur in low-memory conditions or when using custom allocators that simulate allocation failures), it returns NULL. The code then attempts to call the constructor on this null pointer using placement new syntax, resulting in undefined behavior and a Segmentation Fault. This issue has been patched in version 12.3.0.
    Severity
    5.3 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-476 - NULL Pointer Dereference
    Assigner
    References
    Impacted products
    Vendor Product Version
    harfbuzz harfbuzz Affected: < 12.3.0
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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      "title": "Null Pointer Dereference in SubtableUnicodesCache::create leading to DoS"
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    CVE-2024-56732 (GCVE-0-2024-56732)

    Vulnerability from cvelistv5 – Published: 2024-12-27 20:01 – Updated: 2024-12-28 16:48
    VLAI
    Title
    HarfBuzz heap-buffer-overflow on hb_cairo_glyphs_from_buffer
    Summary
    HarfBuzz is a text shaping engine. Starting with 8.5.0 through 10.0.1, there is a heap-based buffer overflow in the hb_cairo_glyphs_from_buffer function.
    Severity
    9.3 (Critical)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
    8.8 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: poc Automatable: no Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-122 - Heap-based Buffer Overflow
    Assigner
    References
    Impacted products
    Vendor Product Version
    harfbuzz harfbuzz Affected: >= 8.5.0, <= 10.0.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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