Risk | Low |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-47040 |
CWE-ID | CWE-119 |
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.
EUVDB-ID: #VU91439
Risk: Low
CVSSv3.1: 7.7 [AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-47040
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to memory corruption within the io_remove_buffers() and io_provide_buffers_prep() functions in fs/io_uring.c. A local user can escalate privileges on the system.
MitigationInstall update from vendor's website.
Vulnerable software versionsLinux kernel: All versions
CPE2.3http://git.kernel.org/stable/c/cbbc13b115b8f18e0a714d89f87fbdc499acfe2d
http://git.kernel.org/stable/c/51bf90901952aaac564bbdb36b2b503050c53dd9
http://git.kernel.org/stable/c/84b8c266c4bfe9ed5128e13253c388deb74b1b03
http://git.kernel.org/stable/c/38134ada0ceea3e848fe993263c0ff6207fd46e7
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.