Advisory Published

USN-4977-1: Linux kernel vulnerabilities

First published: Thu Jun 03 2021(Updated: )

Kiyin (尹亮) discovered that the NFC LLCP protocol implementation in the Linux kernel contained a reference counting error. A local attacker could use this to cause a denial of service (system crash). (CVE-2020-25670) Kiyin (尹亮) discovered that the NFC LLCP protocol implementation in the Linux kernel did not properly deallocate memory in certain error situations. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2020-25671, CVE-2020-25672) Kiyin (尹亮) discovered that the NFC LLCP protocol implementation in the Linux kernel did not properly handle error conditions in some situations, leading to an infinite loop. A local attacker could use this to cause a denial of service. (CVE-2020-25673) Piotr Krysiuk and Benedict Schlueter discovered that the eBPF implementation in the Linux kernel performed out of bounds speculation on pointer arithmetic. A local attacker could use this to expose sensitive information. (CVE-2021-29155) Reiji Watanabe discovered that the KVM VMX implementation in the Linux kernel did not properly prevent user space from tampering with an array index value, leading to a potential out-of-bounds write. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-3501)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-5.11.0-1006-azure<5.11.0-1006.6
5.11.0-1006.6
=21.04
All of
ubuntu/linux-image-5.11.0-1007-oracle<5.11.0-1007.7
5.11.0-1007.7
=21.04
All of
ubuntu/linux-image-5.11.0-1008-aws<5.11.0-1008.8
5.11.0-1008.8
=21.04
All of
ubuntu/linux-image-5.11.0-1008-gcp<5.11.0-1008.9
5.11.0-1008.9
=21.04
All of
ubuntu/linux-image-5.11.0-1008-kvm<5.11.0-1008.8
5.11.0-1008.8
=21.04
All of
ubuntu/linux-image-5.11.0-1009-raspi<5.11.0-1009.10
5.11.0-1009.10
=21.04
All of
ubuntu/linux-image-5.11.0-1009-raspi-nolpae<5.11.0-1009.10
5.11.0-1009.10
=21.04
All of
ubuntu/linux-image-5.11.0-18-generic<5.11.0-18.19
5.11.0-18.19
=21.04
All of
ubuntu/linux-image-5.11.0-18-generic-64k<5.11.0-18.19
5.11.0-18.19
=21.04
All of
ubuntu/linux-image-5.11.0-18-generic-lpae<5.11.0-18.19
5.11.0-18.19
=21.04
All of
ubuntu/linux-image-5.11.0-18-lowlatency<5.11.0-18.19
5.11.0-18.19
=21.04
All of
ubuntu/linux-image-aws<5.11.0.1008.8
5.11.0.1008.8
=21.04
All of
ubuntu/linux-image-azure<5.11.0.1006.6
5.11.0.1006.6
=21.04
All of
ubuntu/linux-image-gcp<5.11.0.1008.8
5.11.0.1008.8
=21.04
All of
ubuntu/linux-image-generic<5.11.0.18.19
5.11.0.18.19
=21.04
All of
ubuntu/linux-image-generic-64k<5.11.0.18.19
5.11.0.18.19
=21.04
All of
ubuntu/linux-image-generic-lpae<5.11.0.18.19
5.11.0.18.19
=21.04
All of
ubuntu/linux-image-gke<5.11.0.1008.8
5.11.0.1008.8
=21.04
All of
ubuntu/linux-image-kvm<5.11.0.1008.8
5.11.0.1008.8
=21.04
All of
ubuntu/linux-image-lowlatency<5.11.0.18.19
5.11.0.18.19
=21.04
All of
ubuntu/linux-image-oracle<5.11.0.1007.7
5.11.0.1007.7
=21.04
All of
ubuntu/linux-image-raspi<5.11.0.1009.7
5.11.0.1009.7
=21.04
All of
ubuntu/linux-image-raspi-nolpae<5.11.0.1009.7
5.11.0.1009.7
=21.04
All of
ubuntu/linux-image-virtual<5.11.0.18.19
5.11.0.18.19
=21.04

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of CVE-2020-25670?

    The severity of CVE-2020-25670 is high.

  • How does CVE-2020-25670 impact the system?

    CVE-2020-25670 can cause a denial of service (system crash).

  • How do I fix CVE-2020-25670?

    To fix CVE-2020-25670, update the Linux kernel to version 5.11.0-1006.6 or later.

  • What is the severity of CVE-2021-3501?

    The severity of CVE-2021-3501 is high.

  • How does CVE-2021-3501 impact the system?

    CVE-2021-3501 can allow an attacker to execute arbitrary code or escalate privileges.

  • How do I fix CVE-2021-3501?

    To fix CVE-2021-3501, update the Linux kernel to the latest available version.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2024 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203