CVE-2026-113680
published 2026-10-20CVE-2026-113680: 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…
PriorityP420medium5.5CVSS 3.1
AVLACLPRNUIRSUCNINAH
EPSS
0.13%
2.4th percentile
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.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| harfbuzz | harfbuzz | 8.0.0 – 14.6.0 | — |
| harfbuzz_project | harfbuzz | — | — |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
nvdv4.06.8MEDIUMCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vendor_redhat5.5MEDIUM
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Red Hat
harfbuzz: harfbuzz: Denial of Service via crafted font in WebAssembly shaper
vendor_redhat·2026-10-20·CVSS 5.5
CVE-2026-113680 [MEDIUM] CWE-476 harfbuzz: harfbuzz: Denial of Service via crafted font in WebAssembly shaper
harfbuzz: harfbuzz: Denial of Service via crafted font in WebAssembly shaper
A flaw was found in HarfBuzz. This vulnerability allows an attacker to cause a Denial of Service (DoS) by supplying a specially crafted font containing an embedded WebAssembly (Wasm) module. When an application shapes text using the malicious font, the module passes out-of-range memory addresses to host import functions, triggering a NULL pointer dereference and crashing the application.
Package: harfbuzz (Red Hat Hardened Images) - Affected
GHSA
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.
ghsa_unreviewed·2026-10-20
CVE-2026-113680 [MEDIUM] CWE-476 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.
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.
No detection rules found.
No public exploits indexed.
https://github.com/harfbuzz/harfbuzz/blob/14.6.0/src/hb-wasm-api-buffer.hh#L153-L181https://github.com/harfbuzz/harfbuzz/blob/14.6.0/src/hb-wasm-api-face.hh#L34-L49https://github.com/harfbuzz/harfbuzz/blob/14.6.0/src/hb-wasm-api-font.hh#L241-L258https://github.com/harfbuzz/harfbuzz/commit/a71aa86c2bac114fafb6b47f8da02024ecb44fa6https://github.com/harfbuzz/harfbuzz/pull/6414https://www.vulncheck.com/advisories/harfbuzz-8.0.0-through-14.6.0-webassembly-shaper-null-pointer-dereference-dos
2026-10-20
Published