# CVE-2024-44957: linux: In the Linux kernel, the following vulnerability has been resolved:  xen: privcmd: Switch from mutex to spinlock for...

CVE-2024-44957 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-44957, released September 4, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-44957
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0016
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 4, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  xen: privcmd: Switch from mutex to spinlock for irqfds  irqfd_wakeup() gets EPOLLHUP, when it is called by eventfd_release() by way of wake_up_poll(&ctx->wqh, EPOLLHUP), which gets called under spin_lock_irqsave(). We can't use a mutex here as it will lead to a deadlock.  Fix it by switching over to a spin lock.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.10.6-1 | [DEBIAN-CVE-2024-44957](https://patchblox.com/security/data/fix/linux/debian-cve-2024-44957.md) | Sep 4, 2024 |
| Linux | linux Debian 14 | 6.10.6-1 | [DEBIAN-CVE-2024-44957](https://patchblox.com/security/data/fix/linux/debian-cve-2024-44957.md) | Sep 4, 2024 |

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