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CVE-2021-4135

MEDIUMCVSS 5.5/10EPSS 0.23%

Last modified

CVE-2021-4135 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A memory leak vulnerability was found in the Linux kernel's eBPF for the Simulated networking device driver in the way user uses BPF for the device such that function nsim_map_alloc_elem being called. A local user could use this flaw to get unauthorized access to some data.. EPSS estimates a 0.23% chance of exploitation in the next 30 days.

Description

A memory leak vulnerability was found in the Linux kernel's eBPF for the Simulated networking device driver in the way user uses BPF for the device such that function nsim_map_alloc_elem being called. A local user could use this flaw to get unauthorized access to some data.

Metrics

CVSS 3.1
5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Probability
0.23%

13.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
LinuxLinux Kernel< 5.16
LinuxLinux Kernel5.16

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-4135?
A memory leak vulnerability was found in the Linux kernel's eBPF for the Simulated networking device driver in the way user uses BPF for the device such that function nsim_map_alloc_elem being called. A local user could use this flaw to get unauthorized access to some data.
How severe is CVE-2021-4135?
CVE-2021-4135 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.23% probability of exploitation in the next 30 days.
How do I fix CVE-2021-4135?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-4135?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST