In the Linux kernel, the following vulnerability has been resolved:
KVM: s390: pci: Fix GISC refcount leak on AIF enable failure
kvm_s390_gisc_register() registers the guest ISC before pinning
the guest interrupt forwarding pages and allocating the AISB bit.
If any of the later setup steps fails, the function unwinds the
pinned pages and other local state, but does not unregister the
GISC reference. Add the missing kvm_s390_gisc_unregister() to the
error unwind path.
References 6
https://git.kernel.org/stable/c/3882224b0e714f34de91e5f28307c5d3fccfe8f8
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/5fb75c5272950b3ebe8bdee7abfdafd44f38313b
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/6cd6e1c978784eec9032e2fe94a53e62b674fe3e
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/6e69317cd44a2f21f8f7a9d93eb3220e868adfa8
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/7b69729046a4c58f4cb457184e5ac4aaa179bff4
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/adce12bb0e0dc82d1d6f0821c9faee3145e62a6f
416baaa9-dc9f-4396-8d5f-8c081fb06d67