CVE-2024-49955: linux kernel — Fix

Description

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().

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-672 CWE-672

Affected Products

Vendor	Product	Versions
linux	linux_kernel	4.17 — 5.10.227
linux	linux_kernel	5.11 — 5.15.168
linux	linux_kernel	5.16 — 6.1.113
linux	linux_kernel	6.2 — 6.6.55
linux	linux_kernel	6.7 — 6.10.14
linux	linux_kernel	6.11 — 6.11.3
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/07b98400cb0285a6348188aa8c5ec6a2ae0551f7 https://git.kernel.org/stable/c/76959aff14a0012ad6b984ec7686d163deccdc16 https://git.kernel.org/stable/c/9f469ef1c79dac7f9ac1518643a33703918f7e13 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

Other References

https://git.kernel.org/stable/c/76fb2cbf01571926da8ecf6876cc8cb07d3f5183 https://git.kernel.org/stable/c/c47843a831e0eae007ad7e848d208e675ba4c132 https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html https://cert-portal.siemens.com/productcert/html/ssa-265688.html https://cert-portal.siemens.com/productcert/html/ssa-355557.html

Frequently Asked Questions

What is CVE-2024-49955? +

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(). It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-49955? +

CVE-2024-49955 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-49955? +

CVE-2024-49955 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-49955? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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