CVE-2023-3269 Distros-[dirtyvma] privilege escalation via non-rcu-protected vma traversal

What is CVE-2023-3269?

CVE-2023-3269 is a high-severity use after free vulnerability in Fedoraproject Fedora, published on 11 Jul 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability exists in the memory management subsystem of the Linux kernel. The lock handling for accessing and updating virtual memory areas (VMAs) is incorrect, leading to use-after-free problems. This issue can be successfully exploited to execute arbitrary kernel code, escalate containers, and gain root privileges.

Weakness: CWE-416

Which versions are affected by CVE-2023-3269?

It affects 3 products.

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

How do I fix CVE-2023-3269?

Apply the vendor's patch.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2023-3269 being exploited?

There is no known exploitation of CVE-2023-3269 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

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All Fedoraproject Fedora vulnerabilities

Sources

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

Also known as AZL-27411, AZL-27644, BELL-CVE-2023-3269, DEBIAN-CVE-2023-3269, GHSA-2j2w-8gvj-wjmj, UBUNTU-CVE-2023-3269 and 1 more.