CWE
416 362
Advisory Published

USN-5630-1: Linux kernel (Raspberry Pi) vulnerabilities

First published: Thu Sep 22 2022(Updated: )

It was discovered that the framebuffer driver on the Linux kernel did not verify size limits when changing font or screen size, leading to an out-of- bounds write. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-33655) 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, CVE-2022-32296) Norbert Slusarek discovered that a race condition existed in the perf subsystem in the Linux kernel, resulting in a use-after-free vulnerability. A privileged local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-1729) It was discovered that the device-mapper verity (dm-verity) driver in the Linux kernel did not properly verify targets being loaded into the device- mapper table. A privileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-2503) Domingo Dirutigliano and Nicola Guerrera discovered that the netfilter subsystem in the Linux kernel did not properly handle rules that truncated packets below the packet header size. When such rules are in place, a remote attacker could possibly use this to cause a denial of service (system crash). (CVE-2022-36946)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-raspi-hwe-18.04<5.4.0.1070.70
5.4.0.1070.70
=18.04
All of
ubuntu/linux-image-5.4.0-1070-raspi<5.4.0-1070.80~18.04.1
5.4.0-1070.80~18.04.1
=18.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this Linux kernel vulnerability?

    The vulnerability ID for this Linux kernel vulnerability is CVE-2021-33655.

  • What is the impact of this vulnerability?

    This vulnerability could allow a local attacker to cause a denial of service or possibly execute arbitrary code.

  • Which versions of Ubuntu are affected by this vulnerability?

    Ubuntu version 18.04 is affected by this vulnerability.

  • What is the recommended version of the Linux kernel to fix this vulnerability?

    The recommended version to fix this vulnerability is 5.4.0.1070.70 or later.

  • Where can I find more information about this vulnerability?

    You can find more information about this vulnerability on the Ubuntu Security website.

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