Improper locking in Linux kernel bluetooth
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-47038 |
| CWE-ID | CWE-667 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Linux kernel Operating systems & Components / Operating system |
| Vendor | Linux Foundation |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Improper locking
EUVDB-ID: #VU90806
Risk: Low
CVSSv3.1: 4.8 [AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-47038
CWE-ID:
CWE-667 - Improper Locking
Exploit availability: No
DescriptionThe vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the hci_conn_get_phy() function in net/bluetooth/hci_conn.c. A local user can perform a denial of service (DoS) attack.
MitigationInstall update from vendor's website.
Vulnerable software versionsLinux kernel: All versions
CPE2.3http://git.kernel.org/stable/c/7cc0ba67883c6c8d3bddb283f56c167fc837a555
http://git.kernel.org/stable/c/fee71f480bc1dec5f6ae3b0b185ff12a62bceabc
http://git.kernel.org/stable/c/332e69eb3bd90370f2d9f2c2ca7974ff523dea17
http://git.kernel.org/stable/c/17486960d79b900c45e0bb8fbcac0262848582ba
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
