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TI-2026-76947 Aliases CVE-2026-113680GHSA-2fqx-2h7j-c7gq

NULL pointer dereference in HarfBuzz WebAssembly shaper crashes apps

Priority LOW 29CWE-476Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-476.

Summary

HarfBuzz from 8.0.0 through 14.6.0 contains a NULL pointer dereference (CWE-476) in the experimental WebAssembly shaper host imports buffer_set_contents, face_create, and font_set_coords. A crafted font whose embedded wasm module passes out-of-range addresses with non-zero lengths crashes any application that shapes text with that font. A local attacker needs a user to process the crafted font, and the impact is limited to availability.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00168 6th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
harfbuzzharfbuzz8.0.0 – 14.6.0—No fix listedCNA
  • harfbuzz Vendorharfbuzz Affected 8.0.0 – 14.6.0 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for harfbuzz.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat Hardened Images

Timeline

  1. 2026-10-20 Threatist record created from CVE-2026-113680
  2. 2026-10-21 Alias added: GHSA-2fqx-2h7j-c7gq
  3. 2026-10-21 Affected versions changed · Red Hat
  4. 2026-10-21 CVSS score added · Red Hat
  5. 2026-10-21 CISA SSVC decision points changed
  6. 2026-10-21 Priority changed: MEDIUM → LOW
  7. 2026-10-22 Affected versions changed · Red Hat

References

Patch 2

Other 3

  • TI-2026-76946 Out-of-bounds write in HarfBuzz WebAssembly font shaper CVSS 4.0HIGH 7.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences