CVE-2024-49955: ACPI: battery: Fix possible crash when unregistering a battery hook
First published: Mon Oct 21 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: ACPI: battery: Fix possible crash when unregistering a battery hook When a battery hook returns an error when adding a new battery, then the battery hook is automatically unregistered. However the battery hook provider cannot know that, so it will later call battery_hook_unregister() on the already unregistered battery hook, resulting in a crash. Fix this by using the list head to mark already unregistered battery hooks as already being unregistered so that they can be ignored by battery_hook_unregister().
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=4.17<5.10.227 | |
| Linux Kernel | >=5.11<5.15.168 | |
| Linux Kernel | >=5.16<6.1.113 | |
| Linux Kernel | >=6.2<6.6.55 | |
| Linux Kernel | >=6.7<6.10.14 | |
| Linux Kernel | >=6.11<6.11.3 | |
| Linux Kernel | =6.12-rc1 | |
| debian/linux | <=5.10.223-1 | 5.10.234-1 6.1.129-1 6.1.128-1 6.12.19-1 6.12.20-1 |
| debian/linux-6.1 | 6.1.128-1~deb11u1 |
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Reference Links
- https://git.kernel.org/stable/c/07b98400cb0285a6348188aa8c5ec6a2ae0551f7
- https://git.kernel.org/stable/c/76959aff14a0012ad6b984ec7686d163deccdc16
- https://git.kernel.org/stable/c/76fb2cbf01571926da8ecf6876cc8cb07d3f5183
- https://git.kernel.org/stable/c/9f469ef1c79dac7f9ac1518643a33703918f7e13
- https://git.kernel.org/stable/c/c47843a831e0eae007ad7e848d208e675ba4c132
- https://git.kernel.org/stable/c/ca1fb7942a287b40659cc79551a1de54a2c2e7d5
- https://git.kernel.org/stable/c/ca26e8eed9c1c6651f51f7fa38fe444f8573cd1b
- https://git.kernel.org/stable/c/ce31847f109c3a5b2abdd19d7bcaafaacfde53de
- https://git.kernel.org/stable/c/da964de4c18199e14b961b5b2e5e6570552a313c
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-49955
- https://nvd.nist.gov/vuln/detail/CVE-2024-49955
- https://launchpad.net/bugs/cve/CVE-2024-49955
- https://security-tracker.debian.org/tracker/CVE-2024-49955
- https://ubuntu.com/security/CVE-2024-49955
- https://git.kernel.org/linus/76959aff14a0012ad6b984ec7686d163deccdc16
Frequently Asked Questions
What is the severity of CVE-2024-49955?
CVE-2024-49955 has been classified with a medium severity level due to its potential to cause crashes when unregistering a battery hook in the Linux kernel.
How do I fix CVE-2024-49955?
To fix CVE-2024-49955, update the Linux kernel to version 6.1.123-1 or later, or to specified patched versions listed for your system.
Which versions of the Linux kernel are affected by CVE-2024-49955?
CVE-2024-49955 affects the Linux kernel versions prior to 5.10.227 and between certain versions from 5.11 to 6.12.
What vulnerabilities does CVE-2024-49955 address?
CVE-2024-49955 addresses a crash vulnerability that could occur when a battery hook returns an error while trying to add a new battery.
Is CVE-2024-49955 a remote vulnerability?
CVE-2024-49955 is not classified as a remote vulnerability as it requires local execution within the Linux kernel to exploit.
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