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CVE-2026-74303: Bluetooth: hci_qca: fix NULL pointer dereference in qca_dmp_hdr() 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 2026-08-17

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_qca: fix NULL pointer dereference in qca_dmp_hdr() for non-serdev device hu->serdev is NULL for hci_uart attached via non-serdev paths, but qca_dmp_hdr() unconditionally dereferences hu->serdev->dev.driver->name, causing a NULL pointer dereference. Fix by guarding the dereference with a NULL check and falling back to "hci_ldisc_qca" for the non-serdev case.

Affected products

• Linux kernel: 6.6 — 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/6b8cbcf08de0db62254d1981f83db0f94681ccd9
• https://git.kernel.org/stable/c/809230cc25dde1d6bb00de2a1eeb5f3199402fbe
• https://git.kernel.org/stable/c/a209744230f9ce3d7a7e9a0839944f5cb5fa02a4
• https://git.kernel.org/stable/c/d54a5fb7d821b88c7c5569d450af59dafccaf414
• https://git.kernel.org/stable/c/e284bb94ad4512ec0bcd9b91bda99e67c507f7f8

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