Bug 2556270 (CVE-2026-113679) - CVE-2026-113679 harfbuzz: HarfBuzz: Out-of-bounds write via crafted font in WebAssembly shaper
Summary: CVE-2026-113679 harfbuzz: HarfBuzz: Out-of-bounds write via crafted font in W...
Keywords:
Status: NEW
Alias: CVE-2026-113679
Product: Security Response
Classification: Other
Component: vulnerability-draft
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-20 15:52 UTC by OSIDB Bzimport
Modified: 2026-10-20 21:07 UTC (History)
0 users

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Description OSIDB Bzimport 2026-10-20 15:52:03 UTC 
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.
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