CWE
416 476 362
Advisory Published

USN-6248-1: Linux kernel (OEM) vulnerabilities

First published: Tue Jul 25 2023(Updated: )

It was discovered that the network queuing discipline implementation in the Linux kernel contained a null pointer dereference in some situations. A local attacker could use this to cause a denial of service (system crash). (CVE-2022-47929) It was discovered that a race condition existed in Adreno GPU DRM driver in the Linux kernel, leading to a double-free vulnerability. A local attacker could use this to cause a denial of service (system crash). (CVE-2023-21106) Stonejiajia, Shir Tamari and Sagi Tzadik discovered that the OverlayFS implementation in the Ubuntu Linux kernel did not properly perform permission checks in certain situations. A local attacker could possibly use this to gain elevated privileges. (CVE-2023-2640) Mingi Cho discovered that the netfilter subsystem in the Linux kernel did not properly validate the status of a nft chain while performing a lookup by id, leading to a use-after-free vulnerability. An attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-31248) Shir Tamari and Sagi Tzadik discovered that the OverlayFS implementation in the Ubuntu Linux kernel did not properly perform permission checks in certain situations. A local attacker could possibly use this to gain elevated privileges. (CVE-2023-32629) Querijn Voet discovered that a race condition existed in the io_uring 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-2023-3389) Tanguy Dubroca discovered that the netfilter subsystem in the Linux kernel did not properly handle certain pointer data type, leading to an out-of- bounds write vulnerability. A privileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-35001)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-6.0.0-1020-oem<6.0.0-1020.20
6.0.0-1020.20
=22.04
All of
ubuntu/linux-image-oem-22.04b<6.0.0.1020.20
6.0.0.1020.20
=22.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-6248-1?

    The severity of USN-6248-1 is not specified in the description.

  • How can a local attacker exploit CVE-2022-47929?

    A local attacker can exploit CVE-2022-47929 by causing a denial of service (system crash) through a null pointer dereference in the network queuing discipline implementation.

  • What is the remedy for the linux-image-6.0.0-1020-oem package?

    The remedy for the linux-image-6.0.0-1020-oem package is to update to version 6.0.0-1020.20.

  • What is the remedy for the linux-image-oem-22.04b package?

    The remedy for the linux-image-oem-22.04b package is to update to version 6.0.0.1020.20.

  • What is the CWE classification of USN-6248-1?

    The CWE classifications for USN-6248-1 are CWE-416 (Use After Free), CWE-476 (Null Pointer Dereference), and CWE-362 (Concurrency Issues).

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