CWE
416
Advisory Published

USN-6045-1: Linux kernel vulnerabilities

First published: Wed Apr 26 2023(Updated: )

It was discovered that the Traffic-Control Index (TCINDEX) implementation in the Linux kernel did not properly perform filter deactivation in some situations. A local attacker could possibly use this to gain elevated privileges. Please note that with the fix for this CVE, kernel support for the TCINDEX classifier has been removed. (CVE-2023-1829) Gwnaun Jung discovered that the SFB packet scheduling implementation 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 execute arbitrary code. (CVE-2022-3586) Zheng Wang and Zhuorao Yang discovered that the RealTek RTL8712U wireless 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 execute arbitrary code. (CVE-2022-4095) It was discovered that the TIPC protocol implementation in the Linux kernel did not properly validate the queue of socket buffers (skb) when handling certain UDP packets. A remote attacker could use this to cause a denial of service. (CVE-2023-1390) It was discovered that the Xircom PCMCIA network device driver in the Linux kernel did not properly handle device removal events. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2023-1670)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-virtual<4.4.0.240.246
4.4.0.240.246
=16.04
All of
ubuntu/linux-image-generic<4.4.0.240.246
4.4.0.240.246
=16.04
All of
ubuntu/linux-image-lowlatency-lts-xenial<4.4.0.240.246
4.4.0.240.246
=16.04
All of
ubuntu/linux-image-aws<4.4.0.1156.160
4.4.0.1156.160
=16.04
All of
ubuntu/linux-image-4.4.0-240-lowlatency<4.4.0-240.274
4.4.0-240.274
=16.04
All of
ubuntu/linux-image-virtual-lts-xenial<4.4.0.240.246
4.4.0.240.246
=16.04
All of
ubuntu/linux-image-4.4.0-1156-aws<4.4.0-1156.171
4.4.0-1156.171
=16.04
All of
ubuntu/linux-image-generic-lts-xenial<4.4.0.240.246
4.4.0.240.246
=16.04
All of
ubuntu/linux-image-4.4.0-240-generic<4.4.0-240.274
4.4.0-240.274
=16.04
All of
ubuntu/linux-image-kvm<4.4.0.1119.116
4.4.0.1119.116
=16.04
All of
ubuntu/linux-image-4.4.0-1119-kvm<4.4.0-1119.129
4.4.0-1119.129
=16.04
All of
ubuntu/linux-image-lowlatency<4.4.0.240.246
4.4.0.240.246
=16.04
All of
ubuntu/linux-image-virtual-lts-xenial<4.4.0.240.208
4.4.0.240.208
=14.04
All of
ubuntu/linux-image-generic-lts-xenial<4.4.0.240.208
4.4.0.240.208
=14.04
All of
ubuntu/linux-image-aws<4.4.0.1118.115
4.4.0.1118.115
=14.04
All of
ubuntu/linux-image-4.4.0-240-generic<4.4.0-240.274~14.04.1
4.4.0-240.274~14.04.1
=14.04
All of
ubuntu/linux-image-4.4.0-240-lowlatency<4.4.0-240.274~14.04.1
4.4.0-240.274~14.04.1
=14.04
All of
ubuntu/linux-image-4.4.0-1118-aws<4.4.0-1118.124
4.4.0-1118.124
=14.04
All of
ubuntu/linux-image-lowlatency-lts-xenial<4.4.0.240.208
4.4.0.240.208
=14.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-6045-1?

    The severity of USN-6045-1 is high.

  • How does the Traffic-Control Index (TCINDEX) vulnerability impact the Linux kernel?

    The Traffic-Control Index (TCINDEX) vulnerability allows a local attacker to gain elevated privileges.

  • Which versions of Ubuntu are affected by USN-6045-1?

    Ubuntu 16.04 and 14.04 are affected by USN-6045-1.

  • What is the remedy for USN-6045-1?

    The remedy for USN-6045-1 is to update the Linux kernel to version 4.4.0.240.246 (exact version may vary).

  • Where can I find more information about USN-6045-1?

    You can find more information about USN-6045-1 on the Ubuntu Security Advisory website.

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