# CVE-2023-52629: linux: In the Linux kernel, the following vulnerability has been resolved:  sh: push-switch: Reorder cleanup operations to a...

CVE-2023-52629 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-52629, released March 29, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-52629
- Priority: High
- CVSS: 8.4 (high)
- EPSS: 0.0025
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 29, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  sh: push-switch: Reorder cleanup operations to avoid use-after-free bug  The original code puts flush_work() before timer_shutdown_sync() in switch_drv_remove(). Although we use flush_work() to stop the worker, it could be rescheduled in switch_timer(). As a result, a use-after-free bug can occur. The details are shown below:        (cpu 0)                    |      (cpu 1) switch_drv_remove()              |  flush_work()                    |   ...                            |  switch_timer // timer                                  |   schedule_work(&psw->work)  timer_shutdown_sync()           |  ...                             |  switch_work_handler // worker  kfree(psw) // free              |                                  |   psw->state = 0 // use  This patch puts timer_shutdown_sync() before flush_work() to mitigate the bugs. As a result, the worker and timer will be stopped safely before the deallocate operations.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.190-1 | [DEBIAN-CVE-2023-52629](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52629.md) | Mar 29, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.5.6-1 | [DEBIAN-CVE-2023-52629](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52629.md) | Mar 29, 2024 |
| Linux | linux Debian 14 | 6.5.6-1 | [DEBIAN-CVE-2023-52629](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52629.md) | Mar 29, 2024 |

---

Data as of 2026-11-08T19:12:23Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.