Skip to content
OpenAdvisories
Unscored USN-5046-1 6 CVEs

linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.11, linux-kvm, linux-oracle, linux-raspi vulnerabilities

Published Aug 18, 2021 · Updated Jun 3, 2026

Ecosystem: Ubuntu

Summary

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)

Michael Brown discovered that the Xen netback driver in the Linux kernel
did not properly handle malformed packets from a network PV frontend,
leading to a use-after-free vulnerability. An attacker in a guest VM could
use this to cause a denial of service or possibly execute arbitrary code.
(CVE-2021-28691)

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)

It was discovered that the bluetooth subsystem in the Linux kernel did not
properly handle HCI device detach events, leading to a use-after-free
vulnerability. An attacker could use this to cause a denial of service or
possibly execute arbitrary code. (CVE-2021-3573)

It was discovered that the NFC implementation in the Linux kernel did not
properly handle failed connect events leading to a NULL pointer
dereference. A local attacker could use this to cause a denial of service.
(CVE-2021-3587)

Fixed packages 1

ReleasePackageFixed in
Ubuntu · 20.04 LTS 20.04:LTS linux-hwe-5.11 5.11.0-27.29~20.04.1

Vulnerabilities 6

References

  • report
    https://ubuntu.com/security/CVE-2020-26558
  • report
    https://ubuntu.com/security/CVE-2021-0129
  • report
    https://ubuntu.com/security/CVE-2021-3564
  • report
    https://ubuntu.com/security/CVE-2021-3573
  • report
    https://ubuntu.com/security/CVE-2021-3587
  • report
    https://ubuntu.com/security/CVE-2021-28691