A use-after-free flaw was found in fs/userfaultfd.c in the Linux kernel before 4.13.6. The issue is related to the handling of fork failure when dealing with event messages. Failure to fork correctly can lead to a situation where a fork event will be removed from an already freed list of events with userfaultfd_ctx_put().

A use-after-free flaw was found in fs/userfaultfd.c in the Linux kernel before 4.13.6. The issue is related to the handling of fork failure when dealing with event messages. Failure to fork correctly can lead to a situation where a fork event will be removed from an already freed list of events with userfaultfd_ctx_put().

kernel: unlimiting the stack disables ASLR kernel: media: use-after-free in [tuner-xc2028] media driver kernel: Buffer overflow in firewire driver via crafted incoming packets kernel: drm/vmwgfx: fix integer overflow in vmw_surface_define_ioctl() kernel: Use-after-free vulnerability in DCCP socket kernel: Incorrect type conversion for size during dma allocation Kernel: kvm: nVMX: L2 guest could access hardware(L0) CR8 register kernel: memory leak when merging buffers in SCSI IO vectors kernel: v4l2: disabled memory access protection mechanism allowing privilege escalation kernel: Buffer over-read in keyring subsystem allows exposing potentially sensitive information to local attacker kernel: Missing permission check in move_pages system call kernel: Null pointer dereference in rngapi_reset function kernel: vfs: BUG in truncate_inode_pages_range() and fuse client kernel: Use-after-free in userfaultfd_event_wait_completion function in userfaultfd.c kernel: Improper error handling of VM_SHARED hugetlbfs mapping in mm/hugetlb.c kernel: net: double-free and memory corruption in get_net_ns_by_id() kernel: Use-after-free in snd_seq_ioctl_create_port() kernel: dereferencing NULL payload with nonzero length kernel: Missing capabilities check in net/netfilter/nfnetlink_cthelper.c allows for unprivileged access to systemwide nfnl_cthelper_list structure kernel: Missing namespace check in net/netlink/af_netlink.c allows for network monitors to observe systemwide activity kernel: Unalloc…

kernel: unlimiting the stack disables ASLR kernel: media: use-after-free in [tuner-xc2028] media driver kernel: Buffer overflow in firewire driver via crafted incoming packets hw: cpu: speculative execution branch target injection hw: cpu: speculative execution permission faults handling kernel: drm/vmwgfx: fix integer overflow in vmw_surface_define_ioctl() kernel: Use-after-free vulnerability in DCCP socket kernel: Incorrect type conversion for size during dma allocation Kernel: kvm: nVMX: L2 guest could access hardware(L0) CR8 register kernel: memory leak when merging buffers in SCSI IO vectors kernel: v4l2: disabled memory access protection mechanism allowing privilege escalation kernel: Buffer over-read in keyring subsystem allows exposing potentially sensitive information to local attacker kernel: Missing permission check in move_pages system call kernel: Null pointer dereference in rngapi_reset function kernel: vfs: BUG in truncate_inode_pages_range() and fuse client kernel: Use-after-free in userfaultfd_event_wait_completion function in userfaultfd.c kernel: Improper error handling of VM_SHARED hugetlbfs mapping in mm/hugetlb.c kernel: net: double-free and memory corruption in get_net_ns_by_id() kernel: Use-after-free in snd_seq_ioctl_create_port() kernel: dereferencing NULL payload with nonzero length kernel: Missing capabilities check in net/netfilter/nfnetlink_cthelper.c allows for unprivileged access to systemwide nfnl_cthelper_list structure kernel: Missing names…

Affected: Ubuntu:16.04:LTS: linux-azure

A use-after-free flaw was found in fs/userfaultfd.c in the Linux kernel before 4.13.6. The issue is related to the handling of fork failure when dealing with event messages. Failure to fork correctly can lead to a situation where a fork event will be removed from an already freed list of events with userfaultfd_ctx_put().