HIGH

CVE-2020-8835

CVSS v3

7.8

HIGH

EPSS Score

26.6%

exploit probability

CISA KEV

No

known exploited

Exploitation

SSVC status

Description

In the Linux kernel 5.5.0 and newer, the bpf verifier (kernel/bpf/verifier.c) did not properly restrict the register bounds for 32-bit operations, leading to out-of-bounds reads and writes in kernel memory. The vulnerability also affects the Linux 5.4 stable series, starting with v5.4.7, as the introducing commit was backported to that branch. This vulnerability was fixed in 5.6.1, 5.5.14, and 5.4.29. (issue is aka ZDI-CAN-10780)

Technical details

Published
4/2/2020

Frequently asked questions

What is CVE-2020-8835?

In the Linux kernel 5.5.0 and newer, the bpf verifier (kernel/bpf/verifier.c) did not properly restrict the register bounds for 32-bit operations, leading to out-of-bounds reads and writes in kernel memory. The vulnerability also affects the Linux 5.4 stable series, starting with v5.4.7, as the introducing commit was backported to that branch. This vulnerability was fixed in 5.6.1, 5.5.14, and 5.4.29. (issue is aka ZDI-CAN-10780)

Is CVE-2020-8835 actively exploited?

Active exploitation of CVE-2020-8835 has not been confirmed. The EPSS score is 26.6%, indicating the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-8835?

CVE-2020-8835 has a CVSS v3 base score of 7.8 (HIGH severity).

Is CVE-2020-8835 affecting your environment?

Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.