CVE-2024-44957 xen: privcmd: Switch from mutex to spinlock for irqfds

What is CVE-2024-44957?

CVE-2024-44957 is a medium-severity vulnerability in Linux kernel, published on 4 Sep 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-667

Which versions are affected by CVE-2024-44957?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-44957?

Apply the vendor's patch.

Is CVE-2024-44957 being exploited?

There is no known exploitation of CVE-2024-44957 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-48789, BELL-CVE-2024-44957, DEBIAN-CVE-2024-44957, GHSA-m5q9-gx2f-vvf3, ROOT-OS-DEBIAN-11-CVE-2024-44957, ROOT-OS-DEBIAN-12-CVE-2024-44957 and 1 more.