CVE-2024-49955 ACPI: battery: Fix possible crash when unregistering a battery hook

What is CVE-2024-49955?

CVE-2024-49955 is a medium-severity vulnerability in Linux kernel, published on 21 Oct 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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().

Weakness: CWE-672

Which versions are affected by CVE-2024-49955?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-49955?

Apply the vendor's patch.

Is CVE-2024-49955 being exploited?

There is no known exploitation of CVE-2024-49955 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-52302, BELL-CVE-2024-49955, DEBIAN-CVE-2024-49955, GHSA-8h6q-7wvm-5w36, UBUNTU-CVE-2024-49955.