DEBIAN-CVE-2026-77159

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    DEBIAN-CVE-2026-77159

    Published: 11 Sept 2026Last Modified: 12 Sept 2026
    Upstream:
    CVE-2026-77159

    Summary:

    Details: A symlink-following flaw was found in libvirt's qemuTPMEmulatorPrepareHost() function. The function uses a path-based chown() on the swtpm logfile without checking for symbolic links. A local attacker with access to the swtpm account can replace the logfile with a symlink, causing libvirtd (running as root) to transfer ownership of an arbitrary file to the swtpm user.

    References: https://security-tracker.debian.org/tracker/CVE-2026-77159

    Affected packages

    Package

    Name: libvirt

    Purl: pkg:deb/debian/libvirt?arch=source&distro=bookworm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    10.0.0-1
    10.0.0-2
    10.0.0-3

    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
    DEBIAN-CVE-2026-77159 | CVE-DB