CWE
190 362
Advisory Published

USN-5115-1: Linux kernel (OEM) vulnerabilities

First published: Wed Oct 20 2021(Updated: )

It was discovered that a race condition existed in the Atheros Ath9k WiFi driver in the Linux kernel. An attacker could possibly use this to expose sensitive information (WiFi network traffic). (CVE-2020-3702) Ofek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk discovered that the BPF verifier in the Linux kernel missed possible mispredicted branches due to type confusion, allowing a side-channel attack. An attacker could use this to expose sensitive information. (CVE-2021-33624) Benedict Schlueter discovered that the BPF subsystem in the Linux kernel did not properly protect against Speculative Store Bypass (SSB) side- channel attacks in some situations. A local attacker could possibly use this to expose sensitive information. (CVE-2021-34556) Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not properly protect against Speculative Store Bypass (SSB) side-channel attacks in some situations. A local attacker could possibly use this to expose sensitive information. (CVE-2021-35477) 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 Option USB High Speed Mobile device driver in the Linux kernel did not properly handle error conditions. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-37159) Alois Wohlschlager discovered that the overlay file system in the Linux kernel did not restrict private clones in some situations. An attacker could use this to expose sensitive information. (CVE-2021-3732) It was discovered that the btrfs file system in the Linux kernel did not properly handle removing a non-existent device id. An attacker with CAP_SYS_ADMIN could use this to cause a denial of service. (CVE-2021-3739) It was discovered that the Qualcomm IPC Router protocol implementation in the Linux kernel did not properly validate metadata in some situations. A local attacker could use this to cause a denial of service (system crash) or expose sensitive information. (CVE-2021-3743) It was discovered that the virtual terminal (vt) device implementation in the Linux kernel contained a race condition in its ioctl handling that led to an out-of-bounds read vulnerability. A local attacker could possibly use this to expose sensitive information. (CVE-2021-3753) It was discovered that the Linux kernel did not properly account for the memory usage of certain IPC objects. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2021-3759) It was discovered that the BPF subsystem in the Linux kernel contained an integer overflow in its hash table implementation. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-38166) 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 Xilinx 10/100 Ethernet Lite device driver in the Linux kernel could report pointer addresses in some situations. An attacker could use this information to ease the exploitation of another vulnerability. (CVE-2021-38205) It was discovered that the ext4 file system in the Linux kernel contained a race condition when writing xattrs to an inode. A local attacker could use this to cause a denial of service or possibly gain administrative privileges. (CVE-2021-40490) 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)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-5.10.0-1050-oem<5.10.0-1050.52
5.10.0-1050.52
=20.04
All of
ubuntu/linux-image-oem-20.04b<5.10.0.1050.52
5.10.0.1050.52
=20.04
All of
ubuntu/linux-image-oem-20.04<5.10.0.1050.52
5.10.0.1050.52
=20.04

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Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this Linux kernel issue?

    The vulnerability ID for this Linux kernel issue is CVE-2020-3702.

  • What is the impact of the vulnerability CVE-2020-3702?

    The vulnerability CVE-2020-3702 allows an attacker to expose sensitive information, specifically WiFi network traffic.

  • Which Linux kernel versions are affected by this vulnerability?

    The Linux kernel versions affected by this vulnerability are 5.10.0-1050.52 and 5.10.0.1050.52.

  • How can I fix the Linux kernel vulnerability CVE-2020-3702?

    To fix the Linux kernel vulnerability CVE-2020-3702, update the kernel to version 5.10.0-1050.52 or 5.10.0.1050.52.

  • Where can I find more information about this vulnerability?

    You can find more information about this vulnerability at the following references: [CVE-2021-3679](https://ubuntu.com/security/CVE-2021-3679), [CVE-2021-34556](https://ubuntu.com/security/CVE-2021-34556), [CVE-2021-35477](https://ubuntu.com/security/CVE-2021-35477).

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