What’s Vulnerable › Vulnerabilities

CVE-2024-35856: Bluetooth: btusb: mediatek: Fix double free of skb in coredump

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-05-17 · updated 2026-08-04
• Weakness: CWE-415

Description

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 <dan.carpenter@linaro.org>

Affected products

• Linux kernel: from 6.6 before 6.6.30; from 6.7 before 6.8.9; 6.9-rc1, 6.9-rc2, 6.9-rc3, 6.9-rc4, 6.9-rc5 — fixed in 6.6.30, 6.8.9

How to fix

Upgrade to a fixed version: Linux kernel 6.6.30, 6.8.9. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/18bdb386a1a30e7a3d7732a98e45e69cf6b5710d
• https://git.kernel.org/stable/c/80dfef128cb9f1b1ef67c0fe8c8deb4ea7ad30c1
• https://git.kernel.org/stable/c/e20093c741d8da9f6390dd45d75b779861547035
• https://git.kernel.org/stable/c/18bdb386a1a30e7a3d7732a98e45e69cf6b5710d
• https://git.kernel.org/stable/c/80dfef128cb9f1b1ef67c0fe8c8deb4ea7ad30c1
• https://git.kernel.org/stable/c/e20093c741d8da9f6390dd45d75b779861547035

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