UBUNTU-CVE-2021-43267

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    UBUNTU-CVE-2021-43267

    Published: 2 Nov 2021Last Modified: 4 Feb 2026
    Upstream:
    CVE-2021-43267
    Aliases:
    USN-5165-1
    USN-5207-1
    USN-5208-1

    Summary:

    Details: An issue was discovered in net/tipc/crypto.c in the Linux kernel before 5.14.16. The Transparent Inter-Process Communication (TIPC) functionality allows remote attackers to exploit insufficient validation of user-supplied sizes for the MSG_CRYPTO message type.

    References: https://ubuntu.com/security/CVE-2021-43267, https://git.kernel.org/linus/fa40d9734a57bcbfa79a280189799f76c88f7bb0, https://github.com/torvalds/linux/commit/fa40d9734a57bcbfa79a280189799f76c88f7bb0, https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.16, https://www.sentinelone.com/labs/tipc-remote-linux-kernel-heap-overflow-allows-arbitrary-code-execution/, https://ubuntu.com/security/notices/USN-5165-1, https://ubuntu.com/security/notices/USN-5207-1, https://ubuntu.com/security/notices/USN-5208-1, https://ubuntu.com/security/notices/USN-5218-1, https://www.cve.org/CVERecord?id=CVE-2021-43267

    Affected packages

    Package

    Name: linux-hwe-edge

    Purl: pkg:deb/ubuntu/[email protected]~16.04.1?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-2021-43267 | CVE-DB