Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.13 |
| Redhat | Enterprise Linux | 6.0 |
| Fedoraproject | Fedora | 34 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2023/07/02/1
- https://bugzilla.redhat.com/show_bug.cgi?id=1966578Issue TrackingThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth.git/commit/?PatchVendor Advisory
- https://www.openwall.com/lists/oss-security/2021/06/08/2ExploitMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2023/07/02/1
- https://bugzilla.redhat.com/show_bug.cgi?id=1966578Issue TrackingThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth.git/commit/?PatchVendor Advisory
- https://www.openwall.com/lists/oss-security/2021/06/08/2ExploitMailing ListThird Party Advisory
FAQ
What is CVE-2021-3573?
CVE-2021-3573 is a vulnerability with a CVSS score of 6.4 (MEDIUM). 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_unregiste...
How severe is CVE-2021-3573?
CVE-2021-3573 has been rated MEDIUM with a CVSS base score of 6.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-3573?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Redhat Enterprise Linux, Fedoraproject Fedora.