Linux Kernel up to 6.6.29/6.8.8 Bluetooth hci_devcd_append double free

Summaryinfo

A vulnerability identified as problematic has been detected in Linux Kernel up to 6.6.29/6.8.8. This vulnerability affects the function hci_devcd_append of the component Bluetooth. This manipulation causes double free. This vulnerability is registered as CVE-2024-35856. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel up to 6.6.29/6.8.8. Affected by this vulnerability is the function hci_devcd_append of the component Bluetooth. The manipulation with an unknown input leads to a double free vulnerability. The CWE definition for the vulnerability is CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btusb: mediatek: Fix double free of skb in coredump hci_devcd_append() would free the skb on error so the caller don't have to free it again otherwise it would cause the double free of skb. Reported-by : Dan Carpenter

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2024-35856 since 05/17/2024. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 12/30/2024).

Upgrading to version 6.6.30 or 6.8.9 eliminates this vulnerability. Applying the patch 80dfef128cb9/e20093c741d8/18bdb386a1a3 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.6.0
• 6.6.1
• 6.6.2
• 6.6.3
• 6.6.4
• 6.6.5
• 6.6.6
• 6.6.7
• 6.6.8
• 6.6.9
• 6.6.10
• 6.6.11
• 6.6.12
• 6.6.13
• 6.6.14
• 6.6.15
• 6.6.16
• 6.6.17
• 6.6.18
• 6.6.19
• 6.6.20
• 6.6.21
• 6.6.22
• 6.6.23
• 6.6.24
• 6.6.25
• 6.6.26
• 6.6.27
• 6.6.28
• 6.6.29
• 6.8.0
• 6.8.1
• 6.8.2
• 6.8.3
• 6.8.4
• 6.8.5
• 6.8.6
• 6.8.7
• 6.8.8

License

• open-source

Website

• Vendor: https://www.kernel.org/

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CPE 2.2info

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