What’s Vulnerable › Vulnerabilities

CVE-2022-49202: Bluetooth: hci_uart: add missing NULL check in h5_enqueue

• Severity: medium (CVSS 5.5 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: 2025-02-26 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_uart: add missing NULL check in h5_enqueue Syzbot hit general protection fault in __pm_runtime_resume(). The problem was in missing NULL check. hu->serdev can be NULL and we should not blindly pass &serdev->dev somewhere, since it will cause GPF.

Affected products

• Linux kernel: from 5.15 before 5.15.33; from 5.16 before 5.16.19; from 5.17 before 5.17.2 — fixed in 5.15.33, 5.16.19, 5.17.2

How to fix

Upgrade to a fixed version: Linux kernel 5.15.33, 5.16.19, 5.17.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/32cb08e958696908a9aad5e49a78d74f7e32fffb
• https://git.kernel.org/stable/c/7235485433d290367d60ae22fcdfc565e61d42ab
• https://git.kernel.org/stable/c/8a3896c30f542439d36303183dc96f65df8cc528
• https://git.kernel.org/stable/c/e6b6c904c0f88588b6a3ace20e4c0d61eab124f8

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