CWE
119 416 476 362
Advisory Published

USN-5789-1: Linux kernel (OEM) vulnerabilities

First published: Thu Jan 05 2023(Updated: )

It was discovered that the NFSD implementation in the Linux kernel did not properly handle some RPC messages, leading to a buffer overflow. A remote attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-43945) Jann Horn discovered that the Linux kernel did not properly track memory allocations for anonymous VMA mappings in some situations, leading to potential data structure reuse. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-42703) Roger Pau Monné 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) Jan Beulich discovered that the Xen network device frontend driver in the Linux kernel incorrectly handled socket buffers (skb) references when communicating with certain backends. A local attacker could use this to cause a denial of service (guest crash). (CVE-2022-33743) It was discovered that a memory leak existed in the IPv6 implementation of the Linux kernel. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2022-3524) It was discovered that a race condition existed in the Bluetooth subsystem in the Linux kernel, 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-2022-3564) It was discovered that the TCP implementation in the Linux kernel contained a data race condition. An attacker could possibly use this to cause undesired behaviors. (CVE-2022-3566) It was discovered that the IPv6 implementation in the Linux kernel contained a data race condition. An attacker could possibly use this to cause undesired behaviors. (CVE-2022-3567) It was discovered that the Realtek RTL8152 USB Ethernet adapter driver in the Linux kernel did not properly handle certain error conditions. A local attacker with physical access could plug in a specially crafted USB device to cause a denial of service (memory exhaustion). (CVE-2022-3594) It was discovered that a null pointer dereference existed in the NILFS2 file system implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2022-3621)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-oem-20.04c<5.14.0.1055.53
5.14.0.1055.53
Ubuntu Ubuntu=20.04
All of
ubuntu/linux-image-oem-20.04b<5.14.0.1055.53
5.14.0.1055.53
Ubuntu Ubuntu=20.04
All of
ubuntu/linux-image-5.14.0-1055-oem<5.14.0-1055.62
5.14.0-1055.62
Ubuntu Ubuntu=20.04
All of
ubuntu/linux-image-oem-20.04<5.14.0.1055.53
5.14.0.1055.53
Ubuntu Ubuntu=20.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-5789-1?

    The severity of USN-5789-1 is high.

  • How does the NFSD implementation vulnerability in the Linux kernel (CVE-2022-43945) impact my system?

    The vulnerability could allow a remote attacker to cause a denial of service (system crash) or possibly execute arbitrary code.

  • Which versions of Ubuntu are affected by USN-5789-1?

    Ubuntu version 20.04 is affected by USN-5789-1.

  • How do I fix the NFSD implementation vulnerability in the Linux kernel?

    To fix the vulnerability, update your system to Linux kernel version 5.14.0.1055.53 or later.

  • Where can I find more information about USN-5789-1?

    You can find more information about USN-5789-1 on the Ubuntu Security Notices website.

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