# CVE-2023-1295: linux: A time-of-check to time-of-use issue exists in io_uring subsystem's IORING_OP_CLOSE operation in the Linux kernel's v...

CVE-2023-1295 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-1295, released June 28, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-1295
- Priority: High
- CVSS: 7.0 (high)
- EPSS: 0.0022
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 28, 2023

## Description

A time-of-check to time-of-use issue exists in io_uring subsystem's IORING_OP_CLOSE operation in the Linux kernel's versions 5.6 - 5.11 (inclusive), which allows a local user to elevate their privileges to root. Introduced in b5dba59e0cf7e2cc4d3b3b1ac5fe81ddf21959eb, patched in 9eac1904d3364254d622bf2c771c4f85cd435fc2, backported to stable in 788d0824269bef539fe31a785b1517882eafed93.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.14.6-1 | [DEBIAN-CVE-2023-1295](https://patchblox.com/security/data/fix/linux/debian-cve-2023-1295.md) | Jun 28, 2023 |
| Linux | linux Debian 13.5 (trixie) | 5.14.6-1 | [DEBIAN-CVE-2023-1295](https://patchblox.com/security/data/fix/linux/debian-cve-2023-1295.md) | Jun 28, 2023 |
| Linux | linux Debian 14 | 5.14.6-1 | [DEBIAN-CVE-2023-1295](https://patchblox.com/security/data/fix/linux/debian-cve-2023-1295.md) | Jun 28, 2023 |

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