CVE-2026-34944

medium Red Hat
CVSS v3 Base Score
4.7
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack Characteristics
Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Published: April 9, 2026 (34 days ago)
Last Modified: April 9, 2026
Vendor: Red Hat
Source: REDHAT

Description

A flaw was found in Wasmtime, a runtime for WebAssembly. On x86-64 platforms with SSE3 disabled, Wasmtime's Cranelift compiler backend may load additional data beyond the intended memory boundary when compiling the 'f64x2.splat' WebAssembly instruction. This out-of-bounds read can lead to a Denial of Service (DoS) through an uncaught segmentation fault if signals-based traps are disabled. While it could also load out-of-sandbox data if guard pages are disabled, this information is not accessible to WebAssembly guests.

CWE

CWE-466

Affected Products

Red Hat Connectivity Link 1Red Hat Enterprise Linux 10

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 github.com