CVE-2023-0469 Use after free in Kernel

What is CVE-2023-0469?

CVE-2023-0469 is a medium-severity use after free vulnerability in Linux kernel, published on 25 Jan 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 flaw was found in io_uring/filetable.c in io_install_fixed_file in the io_uring subcomponent in the Linux Kernel during call cleanup. This flaw may lead to a denial of service.

Weakness: CWE-416, CWE-191

Which versions are affected by CVE-2023-0469?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-0469?

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-2023-0469 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-0469 exists.

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-13171, DEBIAN-CVE-2023-0469, GHSA-p768-xgqw-qmfx, UBUNTU-CVE-2023-0469.