CVE-2024-44957: xen: privcmd: Switch from mutex to spinlock for irqfds
First published: Wed Sep 04 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <6.6.46 | |
| Linux Linux kernel | >=6.7<6.10.5 | |
| debian/linux | <=5.10.223-1<=5.10.226-1<=6.1.115-1<=6.1.119-1 | 6.11.10-1 6.12.5-1 |
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Reference Links
- https://git.kernel.org/stable/c/1c682593096a487fd9aebc079a307ff7a6d054a3
- https://git.kernel.org/stable/c/49f2a5da6785b2dbde93e291cae037662440346e
- https://git.kernel.org/stable/c/c2775ae4d9227729f8ca9ee2a068f62a00d5ea9c
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-44957
- https://nvd.nist.gov/vuln/detail/CVE-2024-44957
- https://launchpad.net/bugs/cve/CVE-2024-44957
- https://security-tracker.debian.org/tracker/CVE-2024-44957
- https://ubuntu.com/security/CVE-2024-44957
- https://git.kernel.org/linus/1c682593096a487fd9aebc079a307ff7a6d054a3
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