OESA-2026-4587

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    OESA-2026-4587

    Published: 29 Oct 2026Last Modified: 29 Oct 2026
    Upstream:
    CVE-2026-93834

    Summary: qemu security update

    Details: QEMU is a FAST! processor emulator using dynamic translation to achieve good emulation speed. Security Fix(es): A use-after-free vulnerability was found in QEMU's 9pfs subsystem. A race condition between the main thread and a worker thread when processing concurrent Tlcreate and Twalk requests allows a malicious guest user to craft a fid path containing stale heap data, bypassing directory traversal restrictions and escaping the shared directory boundary. This can lead to arbitrary host file read/write and code execution (VM escape) as the QEMU process user.(CVE-2026-93834)

    References: https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4587, https://nvd.nist.gov/vuln/detail/CVE-2026-93834

    Affected packages

    Package

    Name: qemu

    Purl: pkg:rpm/openEuler/qemu&distro=openEuler-24.03-LTS-SP4

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -8.2.0-90.oe2403sp4

    Affected versions

    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
    OESA-2026-4587 | CVE-DB