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CVE-2021-3564

Status Candidate

Overview

A flaw double-free memory corruption in the Linux kernel HCI device initialization subsystem was found in the way user attach malicious HCI TTY Bluetooth device. A local user could use this flaw to crash the system. This flaw affects all the Linux kernel versions starting from 3.13.

Related Files

Ubuntu Security Notice USN-5050-1
Posted Aug 24, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5050-1 - 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. 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. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel
systems | linux, ubuntu
advisories | CVE-2020-26558, CVE-2021-28691, CVE-2021-3564, CVE-2021-3573, CVE-2021-38208
MD5 | 7176b3ae5db0a9e37bcee9ef8706ee54
Ubuntu Security Notice USN-5046-1
Posted Aug 18, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5046-1 - 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. 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. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel
systems | linux, ubuntu
advisories | CVE-2020-26558, CVE-2021-28691, CVE-2021-3564, CVE-2021-3573, CVE-2021-3587
MD5 | 293f0d092edfb908a82f3752d94023e9
Ubuntu Security Notice USN-5045-1
Posted Aug 18, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5045-1 - Norbert Slusarek discovered that the CAN broadcast manger protocol implementation in the Linux kernel did not properly initialize memory in some situations. A local attacker could use this to expose sensitive information. 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. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local, protocol
systems | linux, ubuntu
advisories | CVE-2021-34693, CVE-2021-3564, CVE-2021-3573, CVE-2021-3587
MD5 | 4e17a7c9b8838f729fd9457c9d6f46a4
Ubuntu Security Notice USN-5044-1
Posted Aug 18, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5044-1 - 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. 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. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel
systems | linux, ubuntu
advisories | CVE-2021-3564, CVE-2021-3573, CVE-2021-3587
MD5 | 34dd60c976f129698fafb91352efb457
Ubuntu Security Notice USN-5015-1
Posted Jul 21, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5015-1 - 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 or execute arbitrary code. 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. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2021-28691, CVE-2021-33909, CVE-2021-3564, CVE-2021-3573, CVE-2021-3587
MD5 | e0afe945c2de058eec0a91d5407a9356
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