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CVE-2026-113680

HarfBuzz 8.0.0 through 14.6.0 WebAssembly Shaper NULL Pointer Dereference DoS

HarfBuzz from 8.0.0 through 14.6.0 contains a NULL pointer dereference vulnerability in the experimental WebAssembly shaper host imports buffer_set_contents, face_create, and font_set_coords. Attackers can supply a crafted font whose embedded wasm module passes out-of-range addresses with non-zero lengths, crashing any application that shapes text with the font.

CVSS 4.0 · 6.8 Medium EPSS < 1% KEV · Not listed
Vendors
Harfbuzz Project
Products
Harfbuzz
CVE-2026-113679

HarfBuzz 8.0.0 through 14.6.0 Out-of-Bounds Write via WebAssembly font_glyph_to_string

HarfBuzz 8.0.0 through 14.6.0 contains an out-of-bounds write vulnerability in the experimental WebAssembly shaper because the font_glyph_to_string import has a wrong WAMR signature. Attackers can supply a crafted font whose wasm module places the output buffer near linear memory's end, writing glyph-name bytes into host memory to crash or corrupt applications.

CVSS 4.0 · 7.3 High EPSS < 1% KEV · Not listed
Vendors
Harfbuzz Project
Products
Harfbuzz
CVE-2026-0943

HarfBuzz::Shaper versions before 0.032 for Perl contains a bundled library with a null pointer dereference vulnerability

HarfBuzz::Shaper versions before 0.032 for Perl contains a bundled library with a null pointer dereference vulnerability.  Versions before 0.032 contain HarfBuzz 8.4.0 or earlier bundled as hb_src.tar.gz in the source tarball, which is affected by CVE-2026-22693.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Harfbuzz Project Jv
Products
Harfbuzz Harfbuzz\
CVE-2026-22693

Null Pointer Dereference in SubtableUnicodesCache::create leading to DoS

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.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Harfbuzz Project
Products
Harfbuzz
CVE-2024-56732

HarfBuzz heap-buffer-overflow on hb_cairo_glyphs_from_buffer

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.

CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
Vendors
Harfbuzz Project
Products
Harfbuzz
CVE-2015-8947

chromium-browser: Multiple unspecified vulnerabilities in HarfBuzz before 1.0.6

hb-ot-layout-gpos-table.hh in HarfBuzz before 1.0.5 allows remote attackers to cause a denial of service (buffer over-read) or possibly have unspecified other impact via crafted data, a different vulnerability than CVE-2016-2052.

CVSS 3.0 · 7.6 High EPSS 2.6% KEV · Not listed
Vendors
Harfbuzz Project Redhat
Products
Harfbuzz Rhel Extras
CVE-2016-2052

chromium-browser: Multiple unspecified vulnerabilities in HarfBuzz before 1.0.6

Multiple unspecified vulnerabilities in HarfBuzz before 1.0.6, as used in Google Chrome before 48.0.2564.82, allow attackers to cause a denial of service or possibly have other impact via crafted data, as demonstrated by a buffer over-read resulting from an inverted length check in hb-ot-font.cc, a different issue than CVE-2015-8947.

CVSS 3.0 · 7.6 High EPSS < 1% KEV · Not listed
Vendors
Google Harfbuzz Project Redhat
Products
Chrome Harfbuzz Rhel Extras
CVE-2023-25193

harfbuzz: allows attackers to trigger O(n^2) growth via consecutive marks

hb-ot-layout-gsubgpos.hh in HarfBuzz through 6.0.0 allows attackers to trigger O(n^2) growth via consecutive marks during the process of looking back for base glyphs when attaching marks.

CVSS 3.1 · 7.5 High EPSS 1.8% KEV · Not listed
Vendors
Fedoraproject Harfbuzz Project Redhat
Products
Fedora Harfbuzz Enterprise Linux and 5 more
CVE-2021-45931

harfbuzz: out-of-bounds write in hb_bit_set_invertible_t::set

HarfBuzz 2.9.0 has an out-of-bounds write in hb_bit_set_invertible_t::set (called from hb_sparseset_t<hb_bit_set_invertible_t>::set and hb_set_copy).

CVSS 3.1 · 6.5 Medium EPSS 1.8% KEV · Not listed
Vendors
Fedoraproject Harfbuzz Project
Products
Fedora Harfbuzz
CVE-2015-9274

harfbuzz: DoS due to GPOS and GSUB table mishandling

HarfBuzz before 1.0.4 allows remote attackers to cause a denial of service (invalid read of two bytes and application crash) because of GPOS and GSUB table mishandling, related to hb-ot-layout-gpos-table.hh, hb-ot-layout-gsub-table.hh, and hb-ot-layout-gsubgpos-private.hh.

CVSS 3.0 · 6.5 Medium EPSS 1.6% KEV · Not listed
Vendors
Harfbuzz Project
Products
Harfbuzz