CWE
416
Advisory Published

USN-6327-1: Linux kernel (KVM) vulnerabilities

First published: Thu Aug 31 2023(Updated: )

Zheng Zhang discovered that the device-mapper implementation in the Linux kernel did not properly handle locking during table_clear() operations. A local attacker could use this to cause a denial of service (kernel deadlock). (CVE-2023-2269) It was discovered that a use-after-free vulnerability existed in the HFS+ file system implementation in the Linux kernel. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2023-2985) It was discovered that the DVB Core driver in the Linux kernel did not properly handle locking events in certain situations. A local attacker could use this to cause a denial of service (kernel deadlock). (CVE-2023-31084) It was discovered that the virtual terminal driver in the Linux kernel contained a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information (kernel memory). (CVE-2023-3567) It was discovered that the Quick Fair Queueing network scheduler implementation in the Linux kernel contained an out-of-bounds write vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-3611) It was discovered that the network packet classifier with netfilter/firewall marks implementation in the Linux kernel did not properly handle reference counting, 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-2023-3776)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-4.4.0-1123-kvm<4.4.0-1123.133
4.4.0-1123.133
=16.04
All of
ubuntu/linux-image-kvm<4.4.0.1123.120
4.4.0.1123.120
=16.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of CVE-2023-2269?

    The severity of CVE-2023-2269 is classified as high.

  • How does CVE-2023-2269 impact the Linux kernel?

    CVE-2023-2269 can cause a denial of service (kernel deadlock) if exploited by a local attacker.

  • What is the remedy for CVE-2023-2269?

    To fix CVE-2023-2269, you need to upgrade to Linux kernel version 4.4.0-1123.133 or higher.

  • What is the severity of CVE-2023-3611 and CVE-2023-3567?

    The severity of CVE-2023-3611 and CVE-2023-3567 is not available.

  • Are there any known exploits for these vulnerabilities?

    There are no known exploits for CVE-2023-2269, CVE-2023-3611, and CVE-2023-3567 at this time.

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