UBUNTU-CVE-2026-119133

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    UBUNTU-CVE-2026-119133

    Published: 29 Oct 2026Last Modified: 5 Nov 2026
    Upstream:
    CVE-2026-119133

    Summary:

    Details: Wasmtime 47.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a memory misalignment flaw in VMContext layout that causes undefined behavior when modules contain an odd number of exception tags. A WebAssembly module with an odd tag count misaligns subsequent host fields in embedders with exceptions enabled, although no exploitation path is currently known.

    References: https://ubuntu.com/security/CVE-2026-119133, https://www.cve.org/CVERecord?id=CVE-2026-119133, https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-p79w-pv2r-29qp, https://www.vulncheck.com/advisories/wasmtime-47.0.0-before-48.0.6-and-49.0.0-before-49.0.3-misaligned-vmcontext-via-exception-tags

    Affected packages

    Package

    Name: rust-wasmtime

    Purl: pkg:deb/ubuntu/rust-wasmtime?arch=source&distro=noble

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    10.0.1+dfsg-7

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    UBUNTU-CVE-2026-119133 | CVE-DB