The remote Ubuntu 18.04 LTS / 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5668-1 advisory.

    It was discovered that the BPF verifier in the Linux kernel did not properly handle internal data     structures. A local attacker could use this to expose sensitive information (kernel memory).
    (CVE-2021-4159)

    It was discovered that an out-of-bounds write vulnerability existed in the Video for Linux 2 (V4L2)     implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system     crash) or possibly execute arbitrary code. (CVE-2022-20369)

    Duoming Zhou discovered that race conditions existed in the timer handling implementation of the Linux     kernel's Rose X.25 protocol layer, resulting in use-after-free vulnerabilities. A local attacker could use     this to cause a denial of service (system crash). (CVE-2022-2318)

    Roger Pau Monn discovered that the Xen virtual block driver in the Linux kernel did not properly     initialize memory pages to be used for shared communication with the backend. A local attacker could use     this to expose sensitive information (guest kernel memory). (CVE-2022-26365)

    Pawan Kumar Gupta, Alyssa Milburn, Amit Peled, Shani Rehana, Nir Shildan and Ariel Sabba discovered that     some Intel processors with Enhanced Indirect Branch Restricted Speculation (eIBRS) did not properly handle     RET instructions after a VM exits. A local attacker could potentially use this to expose sensitive     information. (CVE-2022-26373)

    Eric Biggers discovered that a use-after-free vulnerability existed in the io_uring subsystem in the Linux     kernel. A local attacker could possibly use this to cause a denial of service (system crash) or possibly     execute arbitrary code. (CVE-2022-3176)

    Roger Pau Monn discovered that the Xen paravirtualization frontend in the Linux kernel did not properly     initialize memory pages to be used for shared communication with the backend. A local attacker could use     this to expose sensitive information (guest kernel memory). (CVE-2022-33740)

    It was discovered that the Xen paravirtualization frontend in the Linux kernel incorrectly shared     unrelated data when communicating with certain backends. A local attacker could use this to cause a denial     of service (guest crash) or expose sensitive information (guest kernel memory). (CVE-2022-33741,     CVE-2022-33742)

    Oleksandr Tyshchenko discovered that the Xen paravirtualization platform in the Linux kernel on ARM     platforms contained a race condition in certain situations. An attacker in a guest VM could use this to     cause a denial of service in the host OS. (CVE-2022-33744)

    It was discovered that the Netlink Transformation (XFRM) subsystem in the Linux kernel contained a     reference counting error. A local attacker could use this to cause a denial of service (system crash).
    (CVE-2022-36879)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

Analytics

Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel vulnerabilities (USN-5668-1)

high Nessus Plugin ID 166012

Version 1.6

Version 1.5

Version 1.4

Version 1.4

Version 1.3

Version 1.3

Version 1.6 Aug 28, 2024, 11:02 PM CVSS metrics ("Cvssv4 score" set to 0.0) CVSSv2 severity (based on None, severity decreased from "High" to "Low") Detection (updated detection logic) Plugin metadata Plugin Feed: 202408282302
Version 1.5 Jan 10, 2024, 8:45 AM Plugin metadata Detection (updated detection logic) Plugin Feed: 202401100845
Version 1.4 Oct 16, 2023, 9:38 PM Detection Plugin metadata Plugin Feed: 202310162138
Version 1.4 Jan 9, 2024, 6:56 PM Detection (updated detection logic) Plugin metadata Plugin Feed: 202401091856
Version 1.3 Jan 18, 2023, 9:01 AM Logic Changes (Added support for s390x) Plugin Feed: 202301180901
Version 1.3 Oct 16, 2023, 7:25 PM Detection Plugin metadata Plugin Feed: 202310161925