CVE-2024-39292: um: Add winch to winch_handlers before registering winch IRQ
First published: Mon Jun 24 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: um: Add winch to winch_handlers before registering winch IRQ Registering a winch IRQ is racy, an interrupt may occur before the winch is added to the winch_handlers list. If that happens, register_winch_irq() adds to that list a winch that is scheduled to be (or has already been) freed, causing a panic later in winch_cleanup(). Avoid the race by adding the winch to the winch_handlers list before registering the IRQ, and rolling back if um_request_irq() fails.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <2.6.23 | |
| Linux Kernel | >=4.19<4.19.316 | |
| Linux Kernel | >=5.4<5.4.278 | |
| Linux Kernel | >=5.10<5.10.219 | |
| Linux Kernel | >=5.15<5.15.161 | |
| Linux Kernel | >=6.1<6.1.93 | |
| Linux Kernel | >=6.6<6.6.33 | |
| Linux Kernel | >=6.9<6.9.4 | |
| Linux Kernel | =6.10.0-rc1 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.16-1 |
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Reference Links
- https://git.kernel.org/stable/c/0c02d425a2fbe52643a5859a779db0329e7dddd4
- https://git.kernel.org/stable/c/31960d991e43c8d6dc07245f19fc13398e90ead2
- https://git.kernel.org/stable/c/351d1a64544944b44732f6a64ed65573b00b9e14
- https://git.kernel.org/stable/c/434a06c38ee1217a8baa0dd7c37cc85d50138fb0
- https://git.kernel.org/stable/c/66ea9a7c6824821476914bed21a476cd20094f33
- https://git.kernel.org/stable/c/73b8e21f76c7dda4905655d2e2c17dc5a73b87f1
- https://git.kernel.org/stable/c/a0fbbd36c156b9f7b2276871d499c9943dfe5101
- https://git.kernel.org/stable/c/dc1ff95602ee908fcd7d8acee7a0dadb61b1a0c0
- https://launchpad.net/bugs/cve/CVE-2024-39292
- https://git.kernel.org/linus/a0fbbd36c156b9f7b2276871d499c9943dfe5101
- https://security-tracker.debian.org/tracker/CVE-2024-39292
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-39292
- https://nvd.nist.gov/vuln/detail/CVE-2024-39292
- https://ubuntu.com/security/CVE-2024-39292
Frequently Asked Questions
What is the severity of CVE-2024-39292?
CVE-2024-39292 has been classified with a moderate severity level due to the potential for race conditions in the Linux kernel.
How can I fix CVE-2024-39292?
To fix CVE-2024-39292, upgrade to the recommended patched versions, such as 5.10.223-1, 5.10.226-1, 6.1.123-1, or higher.
Which versions of the Linux kernel are affected by CVE-2024-39292?
CVE-2024-39292 affects various versions of the Linux kernel, ranging from 2.6.23 up to 6.10.0-rc1.
What is a winch IRQ in relation to CVE-2024-39292?
In CVE-2024-39292, the winch IRQ refers to an interrupt request in the Linux kernel that can be registered in a race-prone manner.
Is CVE-2024-39292 specific to any Linux distributions?
CVE-2024-39292 is relevant to all distributions using the affected versions of the Linux kernel, including those derived from Debian.
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