CVE-2023-53273

In the Linux kernel, the following vulnerability has been resolved: Drivers: vmbus: Check for channel allocation before looking up relids relid2channel() assumes vmbus channel array to be allocated when called. However, in cases such as kdump/kexec, not all relids will be reset by the host. When the second kernel boots and if the guest receives a vmbus interrupt during vmbus driver initialization before vmbus_connect() is called, before it finishes, or if it fails, the vmbus interrupt service routine is called which in turn calls relid2channel() and can cause a null pointer dereference. Print a warning and error out in relid2channel() for a channel id that's invalid in the second kernel.

• linux linux kernel (>= 5.8 < 5.10.178) • linux linux kernel (>= 5.11 < 5.15.107) • linux linux kernel (>= 5.16 < 6.1.24) • linux linux kernel (>= 6.2 < 6.2.11) • linux linux kernel 6.3