Advisory Published

USN-6212-1: Linux kernel (Intel IoTG) vulnerabilities

First published: Fri Jul 07 2023(Updated: )

Hangyu Hua discovered that the Flower classifier implementation in the Linux kernel contained 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-2023-35788, LP: #2023577) It was discovered that for some Intel processors the INVLPG instruction implementation did not properly flush global TLB entries when PCIDs are enabled. An attacker could use this to expose sensitive information (kernel memory) or possibly cause undesired behaviors. (LP: #2023220)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-5.15.0-1034-intel-iotg<5.15.0-1034.39
5.15.0-1034.39
=22.04
All of
ubuntu/linux-image-intel-iotg<5.15.0.1034.33
5.15.0.1034.33
=22.04
All of
ubuntu/linux-image-5.15.0-1034-intel-iotg<5.15.0-1034.39~20.04.1
5.15.0-1034.39~20.04.1
=20.04
All of
ubuntu/linux-image-intel-iotg<5.15.0.1034.39~20.04.25
5.15.0.1034.39~20.04.25
=20.04
All of
ubuntu/linux-image-intel<5.15.0.1034.39~20.04.25
5.15.0.1034.39~20.04.25
=20.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of CVE-2023-35788?

    The severity of CVE-2023-35788 is high.

  • How can an attacker exploit CVE-2023-35788?

    An attacker can exploit CVE-2023-35788 by triggering an out-of-bounds write vulnerability, potentially causing a denial of service (system crash) or executing arbitrary code.

  • Which Linux kernel version is affected by CVE-2023-35788?

    Linux kernel versions 5.15.0-1034.39, 5.15.0-1034.39~20.04.1, 5.15.0.1034.33, 5.15.0.1034.39~20.04.25, and 5.15.0.1034.39~20.04.25 (Intel IoTG) are affected by CVE-2023-35788.

  • How can I fix the vulnerability?

    To fix the vulnerability, update your Linux kernel to version 5.15.0-1034.39 or later (Intel IoTG).

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