# CVE-2022-20409: linux: In io_identity_cow of io_uring.c, there is a possible way to corrupt memory due to a use after free

CVE-2022-20409 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-20409, released October 11, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-20409
- Priority: Routine
- CVSS: 6.7 (medium)
- EPSS: 0.0065
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 11, 2022

## Description

In io_identity_cow of io_uring.c, there is a possible way to corrupt memory due to a use after free. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-238177383References: Upstream kernel

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.14.6-1 | [DEBIAN-CVE-2022-20409](https://patchblox.com/security/data/fix/linux/debian-cve-2022-20409.md) | Oct 11, 2022 |
| Linux | linux Debian 13.5 (trixie) | 5.14.6-1 | [DEBIAN-CVE-2022-20409](https://patchblox.com/security/data/fix/linux/debian-cve-2022-20409.md) | Oct 11, 2022 |
| Linux | linux Debian 14 | 5.14.6-1 | [DEBIAN-CVE-2022-20409](https://patchblox.com/security/data/fix/linux/debian-cve-2022-20409.md) | Oct 11, 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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