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.
References 5
https://git.kernel.org/stable/c/6b8cbcf08de0db62254d1981f83db0f94681ccd9
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/809230cc25dde1d6bb00de2a1eeb5f3199402fbe
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/a209744230f9ce3d7a7e9a0839944f5cb5fa02a4
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/d54a5fb7d821b88c7c5569d450af59dafccaf414
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/e284bb94ad4512ec0bcd9b91bda99e67c507f7f8
416baaa9-dc9f-4396-8d5f-8c081fb06d67