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The UNIX IPC layer in WebKit, including WebKitGTK+ prior to 2.16.3, does not properly…

Priority MEDIUM 51CWE-190Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-190 and the CVSS impact.

Summary

The UNIX IPC layer in WebKit, including WebKitGTK+ prior to 2.16.3, does not properly validate message size metadata, allowing a compromised secondary process to trigger an integer overflow and subsequent buffer overflow in the UI process. This vulnerability does not affect Apple products.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01201 68th 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
Yes
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:webkitgtk:webkitgtk\+:*:*:*:*:*:*:*:*before 2.16.3VulnerableWebKitGTK
  • cpe:2.3:a:webkitgtk:webkitgtk\+:*:*:*:*:*:*:*:* Versions before 2.16.3 Vulnerable ·WebKitGTK

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-1000121
  2. 2026-10-03 Alias added: GHSA-rv46-gc6r-8ffx

References

  • TI-2023-22996 Out-of-bounds write in Apple Safari KEVCVSS 3.1HIGH 8.8
  • TI-2023-22374 Improper check for unusual conditions in Apple macOS KEVCVSS 3.1HIGH 8.8
  • TI-2023-19062 Apple Safari: Processing web content may lead to arbitrary code execution KEVCVSS 3.1HIGH 8.8
  • TI-2023-15726 Type confusion in Apple iOS and iPadOS KEVCVSS 3.1HIGH 8.8
  • TI-2023-15664 Use after free in Apple macOS KEVCVSS 3.1HIGH 8.8
  • TI-2023-22995 Out-of-bounds read in Apple Safari KEVCVSS 3.1MEDIUM 6.5
See all 63 →

Sources