CVE-2021-3501 Memory corruption in kernel

What is CVE-2021-3501?

CVE-2021-3501 is a high-severity memory corruption vulnerability in Fedoraproject Fedora, published on 5 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A flaw was found in the Linux kernel in versions before 5.12. The value of internal.ndata, in the KVM API, is mapped to an array index, which can be updated by a user process at anytime which could lead to an out-of-bounds write. The highest threat from this vulnerability is to data integrity and system availability.

Weakness: CWE-787

Which versions are affected by CVE-2021-3501?

It affects 19 products.

Products include Fedoraproject Fedora, Linux kernel, Netapp Cloud Backup, Netapp H300e Firmware, Netapp H300s Firmware, Netapp H410c Firmware and 13 more.

How do I fix CVE-2021-3501?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-3501 being exploited?

There is no known exploitation of CVE-2021-3501 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-6569, DEBIAN-CVE-2021-3501, GHSA-hvwc-6fg8-r6p5, RHSA-2021:2165, UBUNTU-CVE-2021-3501.