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CVE-2026-74304: Bluetooth: hci_qca: fix NULL pointer dereference in qca_setup() for non-serdev device

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-09-25

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_qca: fix NULL pointer dereference in qca_setup() for non-serdev device hu->serdev is NULL for hci_uart attached via non-serdev paths, but qca_setup() unconditionally calls serdev_device_get_drvdata(hu->serdev) and dereferences the result, causing a NULL pointer dereference. Fix by guarding the dereference with a NULL check, consistent with the rest of qca_setup().

Affected products

• Linux kernel: 7.0 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0704c04769ccc1a0939682db35d816dfa5fe75dc
• https://git.kernel.org/stable/c/3ec629fee178d429f01ae843e4ea888de93012bf
• https://git.kernel.org/stable/c/74f179e75ab03bdc818a5e9709d8a8440c351463

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