# CVE-2022-49968: linux: In the Linux kernel, the following vulnerability has been resolved:  ieee802154/adf7242: defer destroy_workqueue call...

CVE-2022-49968 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49968, released June 18, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49968
- Priority: Routine
- CVSS: 4.7 (medium)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 18, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  ieee802154/adf7242: defer destroy_workqueue call  There is a possible race condition (use-after-free) like below    (FREE)                     |  (USE)   adf7242_remove             |  adf7242_channel    cancel_delayed_work_sync  |     destroy_workqueue (1)    |   adf7242_cmd_rx                              |    mod_delayed_work (2)                              |  The root cause for this race is that the upper layer (ieee802154) is unaware of this detaching event and the function adf7242_channel can be called without any checks.  To fix this, we can add a flag write at the beginning of adf7242_remove and add flag check in adf7242_channel. Or we can just defer the destructive operation like other commit 3e0588c291d6 ("hamradio: defer ax25 kfree after unregister_netdev") which let the ieee802154_unregister_hw() to handle the synchronization. This patch takes the second option.  runs")

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.2-1 | [DEBIAN-CVE-2022-49968](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49968.md) | Jun 18, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.0.2-1 | [DEBIAN-CVE-2022-49968](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49968.md) | Jun 18, 2025 |
| Linux | linux Debian 14 | 6.0.2-1 | [DEBIAN-CVE-2022-49968](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49968.md) | Jun 18, 2025 |

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