UBUNTU-CVE-2026-99221

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    UBUNTU-CVE-2026-99221

    Published: 2 Nov 2026Last Modified: 6 Nov 2026
    Upstream:
    CVE-2026-99221

    Summary:

    Details: In the Linux kernel, the following vulnerability has been resolved: keys/trusted_keys: return immediately after TPM unseal failure trusted_tpm_unseal() proceeds to pcrlock() when the TPM unseal operation fails. If pcrlock() succeeds, its return value overwrites the unseal error, causing key instantiation to succeed. Return immediately when unseal fails to preserve the original error.

    References: https://ubuntu.com/security/CVE-2026-99221, https://www.cve.org/CVERecord?id=CVE-2026-99221, https://git.kernel.org/stable/c/234d09bb3b3d84851d4b3246272addc30f3353eb, https://git.kernel.org/stable/c/63b19ec2863b2cb5279b746ecd3d6210b1a93945, https://git.kernel.org/stable/c/ed697a5f667435bbb1cedbe5bd9f300de645047d, https://git.kernel.org/stable/c/4876f09ce222e140a73aad950882b3605440c935, https://git.kernel.org/stable/c/2d92a0f87c338a08367aff05edd1ade86da4ac8d, https://git.kernel.org/stable/c/6e359d8cb8580b9874801dea930086effd4d9c62, https://git.kernel.org/stable/c/e55d48f21f591a9fe80d26b5fbd1912ea725d9e6

    Affected packages

    Package

    Name: linux-hwe-edge

    Purl: pkg:deb/ubuntu/linux-hwe-edge?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    4.8.0-28.30~16.04.1
    4.8.0-30.32~16.04.1
    4.8.0-32.34~16.04.1
    4.8.0-34.36~16.04.1

    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-2026-99221 | CVE-DB