CVE-2024-27021: r8169: fix LED-related deadlock on module removal
First published: Wed May 01 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: r8169: fix LED-related deadlock on module removal Binding devm_led_classdev_register() to the netdev is problematic because on module removal we get a RTNL-related deadlock. Fix this by avoiding the device-managed LED functions. Note: We can safely call led_classdev_unregister() for a LED even if registering it failed, because led_classdev_unregister() detects this and is a no-op in this case.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux kernel | >=6.8<6.8.8 | |
| Linux kernel | =6.9-rc1 | |
| Linux kernel | =6.9-rc2 | |
| Linux kernel | =6.9-rc3 | |
| Fedora | =38 | |
| Fedora | =39 | |
| Fedora | =40 | |
| 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/19fa4f2a85d777a8052e869c1b892a2f7556569d
- https://git.kernel.org/stable/c/53d986f39acd8ea11c9e460732bfa5add66360d9
- https://launchpad.net/bugs/cve/CVE-2024-27021
- https://git.kernel.org/linus/19fa4f2a85d777a8052e869c1b892a2f7556569d
- https://security-tracker.debian.org/tracker/CVE-2024-27021
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-27021
- https://nvd.nist.gov/vuln/detail/CVE-2024-27021
- https://ubuntu.com/security/CVE-2024-27021
Frequently Asked Questions
What is the severity of CVE-2024-27021?
CVE-2024-27021 has a medium severity due to the resultant deadlock during module removal in the Linux kernel.
How do I fix CVE-2024-27021?
To address CVE-2024-27021, update to the corrected versions of the Linux kernel, such as 5.10.223-1, 6.1.123-1, or later.
Which versions of the Linux kernel are affected by CVE-2024-27021?
CVE-2024-27021 affects Linux kernel versions between 6.8 and 6.9-rc3.
What kind of exploitation risk does CVE-2024-27021 pose?
CVE-2024-27021 can lead to system instability due to a deadlock condition during module removal.
Is CVE-2024-27021 a remote or local vulnerability?
CVE-2024-27021 is considered a local vulnerability, as it requires module removal actions on the affected system.
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