CWE
416 362
Advisory Published

USN-5471-1: Linux kernel (OEM) vulnerabilities

First published: Wed Jun 08 2022(Updated: )

It was discovered that the Linux kernel did not properly restrict access to the kernel debugger when booted in secure boot environments. A privileged attacker could use this to bypass UEFI Secure Boot restrictions. (CVE-2022-21499) Aaron Adams discovered that the netfilter subsystem in the Linux kernel did not properly handle the removal of stateful expressions in some situations, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2022-1966) Moshe Kol, Amit Klein and Yossi Gilad discovered that the IP implementation in the Linux kernel did not provide sufficient randomization when calculating port offsets. An attacker could possibly use this to expose sensitive information. (CVE-2022-1012) Duoming Zhou discovered race conditions in the AX.25 amateur radio protocol implementation in the Linux kernel, leading to use-after-free vulnerabilities. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2022-1205) It was discovered that the Marvell NFC device driver implementation in the Linux kernel did not properly perform memory cleanup operations in some situations, leading to a use-after-free vulnerability. A local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2022-1734) Minh Yuan discovered that the floppy driver in the Linux kernel contained a race condition in some situations, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-1836) Ziming Zhang discovered that the netfilter subsystem in the Linux kernel did not properly validate sets with multiple ranged fields. A local attacker could use this to cause a denial of service or execute arbitrary code. (CVE-2022-1972) Joseph Ravichandran and Michael Wang discovered that the io_uring subsystem in the Linux kernel did not properly initialize data in some situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2022-29968)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-oem-22.04<5.17.0.1011.10
5.17.0.1011.10
=22.04
All of
ubuntu/linux-image-oem-22.04a<5.17.0.1011.10
5.17.0.1011.10
=22.04
All of
ubuntu/linux-image-5.17.0-1011-oem<5.17.0-1011.12
5.17.0-1011.12
=22.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this advisory?

    The vulnerability ID for this advisory is CVE-2022-21499.

  • How can an attacker exploit CVE-2022-21499?

    An attacker can exploit CVE-2022-21499 by bypassing UEFI Secure Boot restrictions through improper kernel debugger access.

  • Which Ubuntu versions are affected by this vulnerability?

    Ubuntu version 22.04 is affected by this vulnerability.

  • What is the remedy for CVE-2022-21499?

    The remedy for CVE-2022-21499 is to upgrade to Ubuntu Ubuntu 22.04 with Linux kernel version 5.17.0.1011.10 or higher.

  • Where can I find more information about this vulnerability?

    More information about this vulnerability can be found at the following references: [CVE-2022-1012](https://ubuntu.com/security/CVE-2022-1012), [CVE-2022-1972](https://ubuntu.com/security/CVE-2022-1972), [CVE-2022-29968](https://ubuntu.com/security/CVE-2022-29968).

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