In the Linux kernel, the following vulnerability has been resolved:

net: ti: icss-iep: Fix possible NULL pointer dereference for perout request

The ICSS IEP driver tracks perout and pps enable state with flags.
Currently when disabling pps and perout signals during icss_iep_exit(),
results in NULL pointer dereference for perout.

To fix the null pointer dereference issue, the icss_iep_perout_enable_hw
function can be modified to directly clear the IEP CMP registers when
disabling PPS or PEROUT, without referencing the ptp_perout_request
structure, as its contents are irrelevant in this case.

https://git.kernel.org/stable/c/7349c9e9979333abfce42da5f9025598083b59c9

https://git.kernel.org/stable/c/7891619d21f07a88e0275d6d43db74035aa74f69

https://git.kernel.org/stable/c/da5035d7aeadcfa44096dd34689bfed6c657f559

https://git.kernel.org/stable/c/eeec66327001421531b3fb1a2ac32efc8a2493b0