CWE
416 476 362
Advisory Published

USN-5756-2: Linux kernel (GKE) vulnerabilities

First published: Fri Dec 02 2022(Updated: )

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) 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 ISDN implementation of the Linux kernel contained a use-after-free vulnerability. A privileged user could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-3565) 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-gke<5.4.0.1090.95
5.4.0.1090.95
=20.04
All of
ubuntu/linux-image-5.4.0-1090-gke<5.4.0-1090.97
5.4.0-1090.97
=20.04
All of
ubuntu/linux-image-gke-5.4<5.4.0.1090.95
5.4.0.1090.95
=20.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-5756-2?

    The severity of USN-5756-2 is high.

  • How do I fix USN-5756-2?

    To fix USN-5756-2, update to the latest version of the Linux kernel package specified in the Ubuntu security advisory.

  • Is there a known exploit for USN-5756-2?

    There are currently no known exploits for USN-5756-2.

  • Which software versions are affected by USN-5756-2?

    USN-5756-2 affects Ubuntu 20.04 with the specified versions of the Linux kernel packages.

  • Where can I find more information about USN-5756-2?

    You can find more information about USN-5756-2 in the Ubuntu security advisory referenced in the description.

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