CVE-2022-1786 Use after free in kernel

What is CVE-2022-1786?

CVE-2022-1786 is a high-severity use after free vulnerability in Linux kernel, published on 31 May 2022. 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 the Linux kernel’s io_uring subsystem in the way a user sets up a ring with IORING_SETUP_IOPOLL with more than one task completing submissions on this ring. This flaw allows a local user to crash or escalate their privileges on the system.

Weakness: CWE-416, CWE-843

Which versions are affected by CVE-2022-1786?

It affects 6 products.

Products include Linux kernel, Netapp H300s Firmware, Netapp H410c Firmware, Netapp H410s Firmware, Netapp H500s Firmware, Netapp H700s Firmware.

How do I fix CVE-2022-1786?

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-2022-1786 being exploited?

There is no known exploitation of CVE-2022-1786 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 A-230867044, A-233078742, ASB-A-230867044, ASB-A-233078742, DEBIAN-CVE-2022-1786, GHSA-pqgc-jq8x-49xv and 1 more.