# CVE-2023-3389: linux: A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege esc...

CVE-2023-3389 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-3389, released June 28, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-3389
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0067
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 28, 2023

## Description

A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation.  Racing a io_uring cancel poll request with a linked timeout can cause a UAF in a hrtimer.  We recommend upgrading past commit ef7dfac51d8ed961b742218f526bd589f3900a59 (4716c73b188566865bdd79c3a6709696a224ac04 for 5.10 stable and 0e388fce7aec40992eadee654193cad345d62663 for 5.15 stable).

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.2-1 | [DEBIAN-CVE-2023-3389](https://patchblox.com/security/data/fix/linux/debian-cve-2023-3389.md) | Jun 28, 2023 |
| Linux | linux Debian 13.5 (trixie) | 6.0.2-1 | [DEBIAN-CVE-2023-3389](https://patchblox.com/security/data/fix/linux/debian-cve-2023-3389.md) | Jun 28, 2023 |
| Linux | linux Debian 14 | 6.0.2-1 | [DEBIAN-CVE-2023-3389](https://patchblox.com/security/data/fix/linux/debian-cve-2023-3389.md) | Jun 28, 2023 |

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