Buffer overflow in Linux kernel bpf
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-47376 |
| 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.
1) Buffer overflow
EUVDB-ID: #VU93604
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-2021-47376
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory corruption within the check_btf_line() function in kernel/bpf/verifier.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/93937596e0652d50973f9dc944fea1694ac8cdfd
http://git.kernel.org/stable/c/6345a0bee80139ea00a341c4202ebfd1534b5eb0
http://git.kernel.org/stable/c/b5fe7cdfee5901ce5513c30e554d51536e003bde
http://git.kernel.org/stable/c/0e6491b559704da720f6da09dd0a52c4df44c514
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.
