CVE-2023-2513 Use after free in Linux kernel ext4 filesystem

What is CVE-2023-2513?

CVE-2023-2513 is a medium-severity use after free vulnerability in Linux kernel, published on 8 May 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A use-after-free vulnerability was found in the Linux kernel's ext4 filesystem in the way it handled the extra inode size for extended attributes. This flaw could allow a privileged local user to cause a system crash or other undefined behaviors.

Weakness: CWE-416

Which versions are affected by CVE-2023-2513?

It affects 2 products.

Products include Linux kernel, Redhat Enterprise Linux.

How do I fix CVE-2023-2513?

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-2023-2513 being exploited?

There is no known exploitation of CVE-2023-2513 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

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

Also known as AZL-26689, DEBIAN-CVE-2023-2513, GHSA-8m42-pwwf-cc8j, UBUNTU-CVE-2023-2513.