CWE
416 362
Advisory Published

USN-6250-1: Linux kernel vulnerabilities

First published: Tue Jul 25 2023(Updated: )

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) It was discovered that the IP-VLAN network driver for the Linux kernel did not properly initialize memory in some situations, leading to an out-of- bounds write vulnerability. An attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-3090) 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) Ruihan Li discovered that the memory management subsystem in the Linux kernel contained a race condition when accessing VMAs in certain conditions, 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-2023-3269) 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) It was discovered that the netfilter subsystem in the Linux kernel did not properly handle some error conditions, 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-2023-3390) 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-6.2.0-1010-gcp<6.2.0-1010.10
6.2.0-1010.10
=23.04
All of
ubuntu/linux-image-aws<6.2.0.1008.9
6.2.0.1008.9
=23.04
All of
ubuntu/linux-image-6.2.0-26-generic-64k<6.2.0-26.26
6.2.0-26.26
=23.04
All of
ubuntu/linux-image-virtual<6.2.0.26.26
6.2.0.26.26
=23.04
All of
ubuntu/linux-image-6.2.0-1008-azure<6.2.0-1008.8
6.2.0-1008.8
=23.04
All of
ubuntu/linux-image-generic-64k<6.2.0.26.26
6.2.0.26.26
=23.04
All of
ubuntu/linux-image-generic<6.2.0.26.26
6.2.0.26.26
=23.04
All of
ubuntu/linux-image-6.2.0-1008-oracle<6.2.0-1008.8
6.2.0-1008.8
=23.04
All of
ubuntu/linux-image-raspi<6.2.0.1009.12
6.2.0.1009.12
=23.04
All of
ubuntu/linux-image-6.2.0-1009-lowlatency<6.2.0-1009.9
6.2.0-1009.9
=23.04
All of
ubuntu/linux-image-ibm<6.2.0.1006.6
6.2.0.1006.6
=23.04
All of
ubuntu/linux-image-6.2.0-26-generic<6.2.0-26.26
6.2.0-26.26
=23.04
All of
ubuntu/linux-image-azure<6.2.0.1008.8
6.2.0.1008.8
=23.04
All of
ubuntu/linux-image-raspi-nolpae<6.2.0.1009.12
6.2.0.1009.12
=23.04
All of
ubuntu/linux-image-6.2.0-26-generic-lpae<6.2.0-26.26
6.2.0-26.26
=23.04
All of
ubuntu/linux-image-kvm<6.2.0.1009.9
6.2.0.1009.9
=23.04
All of
ubuntu/linux-image-6.2.0-1009-lowlatency-64k<6.2.0-1009.9
6.2.0-1009.9
=23.04
All of
ubuntu/linux-image-gcp<6.2.0.1010.10
6.2.0.1010.10
=23.04
All of
ubuntu/linux-image-lowlatency-64k<6.2.0.1009.9
6.2.0.1009.9
=23.04
All of
ubuntu/linux-image-oracle<6.2.0.1008.8
6.2.0.1008.8
=23.04
All of
ubuntu/linux-image-6.2.0-1009-kvm<6.2.0-1009.9
6.2.0-1009.9
=23.04
All of
ubuntu/linux-image-6.2.0-1009-raspi<6.2.0-1009.11
6.2.0-1009.11
=23.04
All of
ubuntu/linux-image-6.2.0-1006-ibm<6.2.0-1006.6
6.2.0-1006.6
=23.04
All of
ubuntu/linux-image-generic-lpae<6.2.0.26.26
6.2.0.26.26
=23.04
All of
ubuntu/linux-image-6.2.0-1008-aws<6.2.0-1008.8
6.2.0-1008.8
=23.04
All of
ubuntu/linux-image-lowlatency<6.2.0.1009.9
6.2.0.1009.9
=23.04

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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-2023-2640.

  • What is the severity of CVE-2023-2640?

    The severity of CVE-2023-2640 is not provided in the advisory.

  • What is the affected software for CVE-2023-2640?

    The affected software for CVE-2023-2640 is Ubuntu kernel version 6.2.0-1010.10 running on Ubuntu 23.04.

  • How can a local attacker exploit CVE-2023-2640?

    A local attacker can exploit CVE-2023-2640 by using certain situations in the OverlayFS implementation to gain elevated privileges.

  • Where can I find more information about CVE-2023-2640?

    You can find more information about CVE-2023-2640 at the Ubuntu Security website.

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