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Unscored USN-5015-1 5 CVEs

linux-oem-5.10 vulnerabilities

Published Jul 20, 2021 · Updated Jun 3, 2026

Summary

It was discovered that the virtual file system implementation in the Linux
kernel contained an unsigned to signed integer conversion error. A local
attacker could use this to cause a denial of service (system crash) or
execute arbitrary code. (CVE-2021-33909)

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-oem-5.10 5.10.0-1038.40

Vulnerabilities 5

References

  • 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
  • report
    https://ubuntu.com/security/CVE-2021-33909