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CVE-2021-3573

Status Candidate

Overview

A use-after-free in function hci_sock_bound_ioctl() of the Linux kernel HCI subsystem was found in the way user calls ioct HCIUNBLOCKADDR or other way triggers race condition of the call hci_unregister_dev() together with one of the calls hci_sock_blacklist_add(), hci_sock_blacklist_del(), hci_get_conn_info(), hci_get_auth_info(). A privileged local user could use this flaw to crash the system or escalate their privileges on the system. This flaw affects the Linux kernel versions prior to 5.13-rc5.

Related Files

Red Hat Security Advisory 2022-0620-01
Posted Feb 23, 2022
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2022-0620-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include double free, out of bounds write, privilege escalation, and use-after-free vulnerabilities.

tags | advisory, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2020-0465, CVE-2020-0466, CVE-2021-0920, CVE-2021-3564, CVE-2021-3573, CVE-2021-3752, CVE-2021-4155, CVE-2022-0330, CVE-2022-22942
SHA-256 | 63324cce18db8d1f06bc8d01cde1688dfbe96f1be29a3d711888a743dee833d0
Red Hat Security Advisory 2022-0622-01
Posted Feb 23, 2022
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2022-0622-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include double free, out of bounds write, privilege escalation, and use-after-free vulnerabilities.

tags | advisory, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2020-0465, CVE-2020-0466, CVE-2021-0920, CVE-2021-3564, CVE-2021-3573, CVE-2021-3752, CVE-2021-4155, CVE-2022-0330, CVE-2022-22942
SHA-256 | 1abf9ccc7a6610c1e2f76510441d10c8276850c7233a64d96784a8a539ab2872
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
SHA-256 | 15f18b4a1645df7896d1474336043a68629898f3145352b2946dd200efd3f028
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
SHA-256 | 911bcc859f7a0c9a9d1bae83c2f53e3ca1b9840869a5229252148bb51ba89399
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
SHA-256 | bde5f3bf782e59c0ed151fd7c46c5d2258f7fcd96669a1026e3e26aff417fae1
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
SHA-256 | 4c707db347e5e85dd8a2e478b9d34805f370899a49b0eb92b09d5abeb6293712
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
SHA-256 | 938c07de4b780e3bfb12805558bfd4d0031ce2064450b55479b032547a6502ec
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