CWE
416
Advisory Published

USN-6348-1: Linux kernel vulnerabilities

First published: Wed Sep 06 2023(Updated: )

Daniel Moghimi discovered that some Intel(R) Processors did not properly clear microarchitectural state after speculative execution of various instructions. A local unprivileged user could use this to obtain to sensitive information. (CVE-2022-40982) Tavis Ormandy discovered that some AMD processors did not properly handle speculative execution of certain vector register instructions. A local attacker could use this to expose sensitive information. (CVE-2023-20593) Ye Zhang and Nicolas Wu discovered that the io_uring subsystem in the Linux kernel did not properly handle locking for rings with IOPOLL, leading to a double-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-21400) It was discovered that the universal 32bit network packet classifier implementation in the Linux kernel did not properly perform reference counting in some situations, 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-2023-3609) It was discovered that the netfilter subsystem in the Linux kernel did not properly handle certain 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-2023-3610) 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) Kevin Rich discovered that the netfilter subsystem in the Linux kernel did not properly handle table rules flush in certain circumstances. A local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2023-3777) Kevin Rich discovered that the netfilter subsystem in the Linux kernel did not properly handle rule additions to bound chains in certain circumstances. A local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2023-3995) It was discovered that the netfilter subsystem in the Linux kernel did not properly handle PIPAPO element removal, 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-2023-4004) Kevin Rich discovered that the netfilter subsystem in the Linux kernel did not properly handle bound chain deactivation in certain circumstances. A local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2023-4015)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-5.15.0-1036-raspi<5.15.0-1036.39
5.15.0-1036.39
=22.04
All of
ubuntu/linux-image-raspi<5.15.0.1036.34
5.15.0.1036.34
=22.04
All of
ubuntu/linux-image-raspi-nolpae<5.15.0.1036.34
5.15.0.1036.34
=22.04
All of
ubuntu/linux-image-5.15.0-1038-intel-iotg<5.15.0-1038.43~20.04.1
5.15.0-1038.43~20.04.1
=20.04
All of
ubuntu/linux-image-intel<5.15.0.1038.43~20.04.28
5.15.0.1038.43~20.04.28
=20.04
All of
ubuntu/linux-image-intel-iotg<5.15.0.1038.43~20.04.28
5.15.0.1038.43~20.04.28
=20.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-6348-1?

    The severity of USN-6348-1 is high.

  • How can an unprivileged user exploit CVE-2022-40982?

    An unprivileged user can exploit CVE-2022-40982 by using speculative execution to obtain sensitive information.

  • What is the affected software version for Ubuntu 22.04?

    The affected software version for Ubuntu 22.04 is linux-image-5.15.0-1036-raspi.

  • How do I fix the vulnerability in Ubuntu 20.04?

    To fix the vulnerability in Ubuntu 20.04, update to linux-image-5.15.0-1038-intel-iotg version 5.15.0-1038.43~20.04.1.

  • Where can I find more details about the vulnerability?

    More details about the vulnerability can be found on the Ubuntu security website.

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