CWE
119 416
Advisory Published

USN-5299-1: Linux kernel vulnerabilities

First published: Tue Feb 22 2022(Updated: )

Mathy Vanhoef discovered that the Linux kernel’s WiFi implementation could reassemble mixed encrypted and plaintext fragments. A physically proximate attacker could possibly use this issue to inject packets or exfiltrate selected fragments. (CVE-2020-26147) It was discovered that the bluetooth subsystem in the Linux kernel did not properly perform access control. An authenticated attacker could possibly use this to expose sensitive information. (CVE-2020-26558, CVE-2021-0129) It was discovered that the RPA PCI Hotplug driver implementation in the Linux kernel did not properly handle device name writes via sysfs, leading to a buffer overflow. A privileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-28972) It was discovered that a use-after-free existed in the Bluetooth HCI driver of the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-33034) Norbert Slusarek discovered that the CAN broadcast manger (bcm) protocol implementation in the Linux kernel did not properly initialize memory in some situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2021-34693) 马哲宇 discovered that the IEEE 1394 (Firewire) nosy packet sniffer driver 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-2021-3483) It was discovered that the bluetooth subsystem in the Linux kernel did not properly handle HCI device initialization failure, leading to a double-free vulnerability. An attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2021-3564) Murray McAllister discovered that the joystick device interface in the Linux kernel did not properly validate data passed via an ioctl(). A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code on systems with a joystick device registered. (CVE-2021-3612) It was discovered that the tracing subsystem in the Linux kernel did not properly keep track of per-cpu ring buffer state. A privileged attacker could use this to cause a denial of service. (CVE-2021-3679) It was discovered that the MAX-3421 host USB 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-2021-38204) It was discovered that the 6pack network protocol driver in the Linux kernel did not properly perform validation checks. A privileged attacker could use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2021-42008) Amit Klein discovered that the IPv6 implementation in the Linux kernel could disclose internal state in some situations. An attacker could possibly use this to expose sensitive information. (CVE-2021-45485)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-virtual<4.4.0.219.226
4.4.0.219.226
=16.04
All of
ubuntu/linux-image-generic<4.4.0.219.226
4.4.0.219.226
=16.04
All of
ubuntu/linux-image-aws<4.4.0.1135.140
4.4.0.1135.140
=16.04
All of
ubuntu/linux-image-4.4.0-219-lowlatency<4.4.0-219.252
4.4.0-219.252
=16.04
All of
ubuntu/linux-image-4.4.0-1100-kvm<4.4.0-1100.109
4.4.0-1100.109
=16.04
All of
ubuntu/linux-image-4.4.0-1135-aws<4.4.0-1135.149
4.4.0-1135.149
=16.04
All of
ubuntu/linux-image-4.4.0-219-generic<4.4.0-219.252
4.4.0-219.252
=16.04
All of
ubuntu/linux-image-kvm<4.4.0.1100.98
4.4.0.1100.98
=16.04
All of
ubuntu/linux-image-lowlatency<4.4.0.219.226
4.4.0.219.226
=16.04
All of
ubuntu/linux-image-generic-lts-xenial<4.4.0.219.190
4.4.0.219.190
=14.04
All of
ubuntu/linux-image-4.4.0-1099-aws<4.4.0-1099.104
4.4.0-1099.104
=14.04
All of
ubuntu/linux-image-4.4.0-219-lowlatency<4.4.0-219.252~14.04.1
4.4.0-219.252~14.04.1
=14.04
All of
ubuntu/linux-image-4.4.0-219-generic<4.4.0-219.252~14.04.1
4.4.0-219.252~14.04.1
=14.04
All of
ubuntu/linux-image-aws<4.4.0.1099.97
4.4.0.1099.97
=14.04
All of
ubuntu/linux-image-lowlatency-lts-xenial<4.4.0.219.190
4.4.0.219.190
=14.04
All of
ubuntu/linux-image-virtual-lts-xenial<4.4.0.219.190
4.4.0.219.190
=14.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-5299-1?

    The severity of USN-5299-1 is moderate.

  • How does the Linux kernel's WiFi vulnerability (CVE-2020-26147) work?

    The vulnerability allows a physically proximate attacker to inject packets or exfiltrate selected fragments by exploiting the issue in the Linux kernel's WiFi implementation that can reassemble mixed encrypted and plaintext fragments.

  • Which Ubuntu versions are affected by USN-5299-1?

    Ubuntu 16.04 and 14.04 are affected by USN-5299-1.

  • How can I fix the Linux kernel vulnerabilities on Ubuntu 16.04?

    To fix the vulnerabilities on Ubuntu 16.04, you need to update the affected packages to their respective remedy versions.

  • Where can I find more information about USN-5299-1?

    You can find more information about USN-5299-1 on the Ubuntu Security Notices website.

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