CVE-2024-56604: Bluetooth: RFCOMM: avoid leaving dangling sk pointer in rfcomm_sock_alloc()
First published: Fri Dec 27 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: RFCOMM: avoid leaving dangling sk pointer in rfcomm_sock_alloc() bt_sock_alloc() attaches allocated sk object to the provided sock object. If rfcomm_dlc_alloc() fails, we release the sk object, but leave the dangling pointer in the sock object, which may cause use-after-free. Fix this by swapping calls to bt_sock_alloc() and rfcomm_dlc_alloc().
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <6.1.120 | |
| Linux Kernel | >=6.2<6.6.66 | |
| Linux Kernel | >=6.7<6.12.5 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-56604?
CVE-2024-56604 is classified as a high severity vulnerability in the Linux kernel affecting Bluetooth functionality.
How do I fix CVE-2024-56604?
To fix CVE-2024-56604, upgrade your Linux kernel to a version that is equal to or greater than 6.1.120 or within the safe ranges not affected by this CVE.
Which Linux kernel versions are vulnerable to CVE-2024-56604?
Linux kernel versions before 6.1.120, between 6.2 and 6.6.66, and between 6.7 and 6.12.5 are vulnerable to CVE-2024-56604.
What component of the Linux kernel does CVE-2024-56604 affect?
CVE-2024-56604 affects the Bluetooth RFCOMM implementation in the Linux kernel.
Are all Linux distributions affected by CVE-2024-56604?
Not all Linux distributions will be affected; it depends on whether they use versions of the Linux kernel that are vulnerable to CVE-2024-56604.
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