CVE-2023-5717 Out-of-bounds write in Linux kernel's Linux Kernel Performance Events (perf) component

What is CVE-2023-5717?

CVE-2023-5717 is a high-severity memory corruption vulnerability in Linux kernel, published on 25 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A heap out-of-bounds write vulnerability in the Linux kernel's Linux Kernel Performance Events (perf) component can be exploited to achieve local privilege escalation.

If perf_read_group() is called while an event's sibling_list is smaller than its child's sibling_list, it can increment or write to memory locations outside of the allocated buffer.

We recommend upgrading past commit 32671e3799ca2e4590773fd0e63aaa4229e50c06.

Weakness: CWE-787

Which versions are affected by CVE-2023-5717?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-5717?

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-2023-5717 being exploited?

There is no known exploitation of CVE-2023-5717 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

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-31774, AZL-31814, BELL-CVE-2023-5717, DEBIAN-CVE-2023-5717, GHSA-gv6g-gf42-rjg7, UBUNTU-CVE-2023-5717.