usb: gadget: u_serial: Add null pointer check in gserial_resume
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.1%
exploitation probability
0.1%top 96% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
usb: gadget: u_serial: Add null pointer check in gserial_resume
Consider a case where gserial_disconnect has already cleared
gser->ioport. And if a wakeup interrupt triggers afterwards,
gserial_resume gets called, which will lead to accessing of
gser->ioport and thus causing null pointer dereference.Add
a null pointer check to prevent this.
Added a static spinlock to prevent gser->ioport from becoming
null after the newly added check.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/3b24c980dc07be4550a9d1450ed7057f882530e5https://git.kernel.org/stable/c/44e004f757a7ae13dfebaadbcfdb1a6f98c10377https://git.kernel.org/stable/c/5ec63fdbca604568890c577753c6f66c5b3ef0b5https://git.kernel.org/stable/c/c5360eec648bd506afa304ae4a71f82e13d41897https://git.kernel.org/stable/c/ec357cd3e8af614855d286dd378725cdc7264df6