CVE-2026-34945

medium Red Hat
CVSS v3 Base Score
5.6
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Attack Characteristics
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Confidentiality
High
Integrity
None
Availability
None
Published: April 9, 2026 (34 days ago)
Last Modified: April 9, 2026
Vendor: Red Hat
Source: REDHAT

Description

A flaw was found in Wasmtime's Winch compiler. This vulnerability, present in versions from 25.0.0 to before 36.0.7, 42.0.2, and 43.0.1, arises from an incorrect translation of the `table.size` instruction for 64-bit WebAssembly tables. An attacker, by crafting a malicious WebAssembly guest, could exploit this flaw to read sensitive data from the host's stack. This information disclosure could expose data related to other host operations that should not be accessible to guests.

CWE

CWE-681

Affected Products

Red Hat Connectivity Link 1Red Hat Enterprise Linux 10

References

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