CVE-2023-6560 Kernel: io_uring out of boundary memory access in __io_uaddr_map()

What is CVE-2023-6560?

CVE-2023-6560 is a medium-severity memory corruption vulnerability in Linux kernel, published on 8 Dec 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

An out-of-bounds memory access flaw was found in the io_uring SQ/CQ rings functionality in the Linux kernel. This issue could allow a local user to crash the system.

Weakness: CWE-119, CWE-823

Which versions are affected by CVE-2023-6560?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-6560?

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-2023-6560 being exploited?

There is no known exploitation of CVE-2023-6560 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-32173, DEBIAN-CVE-2023-6560, GHSA-q2h3-9c64-6vmc, UBUNTU-CVE-2023-6560.