Denial of service in Linux kernel btrfs
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-46987 |
| CWE-ID | CWE-833 |
| 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) Deadlock
EUVDB-ID: #VU87739
Risk: Low
CVSSv3.1: 4.8 [CVSS:3.1/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-2021-46987
CWE-ID:
CWE-833 - Deadlock
Exploit availability: No
DescriptionThe vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a deadlock when cloning inline extent with low amount of free metadata space in btrfs. A local user can perform a denial of service (DoS) attack.
Install updates from vendor's website.
Vulnerable software versionsLinux kernel: All versions
External linkshttp://git.kernel.org/stable/c/d5347827d0b4b2250cbce6eccaa1c81dc78d8651
http://git.kernel.org/stable/c/96157707c0420e3d3edfe046f1cc797fee117ade
http://git.kernel.org/stable/c/f9baa501b4fd6962257853d46ddffbc21f27e344
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.
