# CVE-2022-1786: linux: 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...

CVE-2022-1786 is fixed in 12 products on 1 platform, first by ELSA-2022-9425, released May 24, 2022. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-1786
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0102
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 24, 2022

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | kernel-uek ol 8 | 0:5.4.17-2136.307.3.4.el8uek | [ELSA-2022-9425](https://patchblox.com/security/data/fix/linux/elsa-2022-9425.md) | May 24, 2022 |
| Linux | kernel-uek-container ol 8 | 0:5.4.17-2136.307.3.4.el8 | [ELSA-2022-9426](https://patchblox.com/security/data/fix/linux/elsa-2022-9426.md) | May 24, 2022 |
| Linux | kernel-uek-container-debug ol 8 | 0:5.4.17-2136.307.3.4.el8 | [ELSA-2022-9426](https://patchblox.com/security/data/fix/linux/elsa-2022-9426.md) | May 24, 2022 |
| Linux | kernel-uek-debug ol 8 | 0:5.4.17-2136.307.3.4.el8uek | [ELSA-2022-9425](https://patchblox.com/security/data/fix/linux/elsa-2022-9425.md) | May 24, 2022 |
| Linux | kernel-uek-debug-devel ol 8 | 0:5.4.17-2136.307.3.4.el8uek | [ELSA-2022-9425](https://patchblox.com/security/data/fix/linux/elsa-2022-9425.md) | May 24, 2022 |
| Linux | kernel-uek-devel ol 8 | 0:5.4.17-2136.307.3.4.el8uek | [ELSA-2022-9425](https://patchblox.com/security/data/fix/linux/elsa-2022-9425.md) | May 24, 2022 |
| Linux | kernel-uek-doc ol 8 | 0:5.4.17-2136.307.3.4.el8uek | [ELSA-2022-9425](https://patchblox.com/security/data/fix/linux/elsa-2022-9425.md) | May 24, 2022 |
| Linux | kernel-uek-tools ol 8 | 0:5.4.17-2136.307.3.4.el7uek | [ELSA-2022-9425](https://patchblox.com/security/data/fix/linux/elsa-2022-9425.md) | May 24, 2022 |
| Linux | kernel-uek-tools-libs ol 8 | 0:5.4.17-2136.307.3.4.el7uek | [ELSA-2022-9425](https://patchblox.com/security/data/fix/linux/elsa-2022-9425.md) | May 24, 2022 |
| Linux | linux Debian 12.15 (bookworm) | 5.14.6-1 | [DEBIAN-CVE-2022-1786](https://patchblox.com/security/data/fix/linux/debian-cve-2022-1786.md) | Jun 2, 2022 |
| Linux | linux Debian 13.5 (trixie) | 5.14.6-1 | [DEBIAN-CVE-2022-1786](https://patchblox.com/security/data/fix/linux/debian-cve-2022-1786.md) | Jun 2, 2022 |
| Linux | linux Debian 14 | 5.14.6-1 | [DEBIAN-CVE-2022-1786](https://patchblox.com/security/data/fix/linux/debian-cve-2022-1786.md) | Jun 2, 2022 |
| Linux | perf ol 8 | 0:5.4.17-2136.307.3.4.el7uek | [ELSA-2022-9425](https://patchblox.com/security/data/fix/linux/elsa-2022-9425.md) | May 24, 2022 |
| Linux | python-perf ol 8 | 0:5.4.17-2136.307.3.4.el7uek | [ELSA-2022-9425](https://patchblox.com/security/data/fix/linux/elsa-2022-9425.md) | May 24, 2022 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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