CVE-2021-3600 Memory corruption in linux

What is CVE-2021-3600?

CVE-2021-3600 is a high-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 8 Jan 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

It was discovered that the eBPF implementation in the Linux kernel did not properly track bounds information for 32 bit registers when performing div and mod operations. A local attacker could use this to possibly execute arbitrary code.

Weakness: CWE-787, CWE-125

Which versions are affected by CVE-2021-3600?

It affects 4 products.

Products include Canonical Ubuntu Linux, Fedoraproject Fedora, Linux kernel, Redhat Enterprise Linux.

How do I fix CVE-2021-3600?

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-2021-3600 being exploited?

There is no known exploitation of CVE-2021-3600 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

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

Also known as BELL-CVE-2021-3600, DEBIAN-CVE-2021-3600, GHSA-769h-g9v6-cwg7, UBUNTU-CVE-2021-3600.