CVE-2024-35831 io_uring: Fix release of pinned pages when __io_uaddr_map fails

What is CVE-2024-35831?

CVE-2024-35831 is a medium-severity memory corruption vulnerability in Linux kernel, published on 17 May 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

io_uring: Fix release of pinned pages when __io_uaddr_map fails

Looking at the error path of __io_uaddr_map, if we fail after pinning the pages for any reasons, ret will be set to -EINVAL and the error handler won't properly release the pinned pages.

I didn't manage to trigger it without forcing a failure, but it can happen in real life when memory is heavily fragmented.

Weakness: CWE-401

Which versions are affected by CVE-2024-35831?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-35831?

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-2024-35831 being exploited?

There is no known exploitation of CVE-2024-35831 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 BELL-CVE-2024-35831, DEBIAN-CVE-2024-35831, GHSA-hhcf-pxch-r4cf, UBUNTU-CVE-2024-35831.