Risk | Low |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2020-8835 |
CWE-ID | CWE-119 |
Exploitation vector | Local |
Public exploit | Public exploit code for vulnerability #1 is available. |
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: #VU26466
Risk: Low
CVSSv3.1: 7.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2020-8835
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: Yes
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in bpf verifier for 32 bit systems in Linux kernel. A local user can rigger a buffer overflow and gain access to sensitive information or execute arbitrary code on the system with elevated privileges.
Install updates from vendor's website.
As a temporary solution set the following sysctl:
kernel.unprivileged_bpf_disabled = 1Vulnerable software versions
Linux kernel: 5.5 - 5.5.13
External linkshttp://lore.kernel.org/bpf/20200330160324.15259-1-daniel
http://seclists.org/oss-sec/2020/q1/127
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. However, proof of concept for this vulnerability is available.