A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilege(CPL) level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside guest.
A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilege(CPL) level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside guest.
kernel: Information exposure in fd_locked_ioctl function in drivers/block/floppy.c kernel: Memory leak in drivers/net/wireless/mac80211_hwsim.c:hwsim_new_radio_nl() can lead to potential denial of service kernel: Buffer overflow in hidp_process_report kernel: HID: debug: Buffer overflow in hid_debug_events_read() in drivers/hid/hid-debug.c kernel: l2tp: Race condition between pppol2tp_session_create() and l2tp_eth_create() kernel: kvm: guest userspace to guest kernel write kernel: Integer overflow in the alarm_timer_nsleep function kernel: NULL pointer dereference in lookup_slow function kernel: NULL pointer dereference in xfs_da_shrink_inode function kernel: NULL pointer dereference in fs/xfs/libxfs/xfs_inode_buf.c kernel: use-after-free Read in vhost_transport_send_pkt kernel: use-after-free in ucma_leave_multicast in drivers/infiniband/core/ucma.c kernel: Mishandling of indirect calls weakens Spectre mitigation for paravirtual guests kernel: Information leak in cdrom_ioctl_drive_status kernel: out-of-bound read in memcpy_fromiovecend() kernel: TLB flush happens too late on mremap kernel: Use-after-free in sound/usb/card.c:usb_audio_probe() kernel: Heap address information leak while using L2CAP_GET_CONF_OPT kernel: Heap address information leak while using L2CAP_PARSE_CONF_RSP kernel: denial of service vector through vfio DMA mappings Kernel: vhost_net: infinite loop while receiving packets leads to DoS Kernel: page cache side channel attacks Kernel: KVM: leak of uninitia…
kernel: Information exposure in fd_locked_ioctl function in drivers/block/floppy.c kernel: Memory leak in drivers/net/wireless/mac80211_hwsim.c:hwsim_new_radio_nl() can lead to potential denial of service kernel: Buffer overflow in hidp_process_report kernel: HID: debug: Buffer overflow in hid_debug_events_read() in drivers/hid/hid-debug.c kernel: l2tp: Race condition between pppol2tp_session_create() and l2tp_eth_create() kernel: kvm: guest userspace to guest kernel write kernel: Integer overflow in the alarm_timer_nsleep function kernel: NULL pointer dereference in lookup_slow function kernel: NULL pointer dereference in xfs_da_shrink_inode function kernel: NULL pointer dereference in fs/xfs/libxfs/xfs_inode_buf.c kernel: use-after-free Read in vhost_transport_send_pkt kernel: use-after-free in ucma_leave_multicast in drivers/infiniband/core/ucma.c kernel: Mishandling of indirect calls weakens Spectre mitigation for paravirtual guests kernel: Information leak in cdrom_ioctl_drive_status kernel: out-of-bound read in memcpy_fromiovecend() kernel: TLB flush happens too late on mremap kernel: Heap address information leak while using L2CAP_GET_CONF_OPT kernel: Heap address information leak while using L2CAP_PARSE_CONF_RSP kernel: denial of service vector through vfio DMA mappings Kernel: vhost_net: infinite loop while receiving packets leads to DoS Kernel: page cache side channel attacks Kernel: KVM: leak of uninitialized stack contents to guest kernel: OOB write due to missin…
Security update for the Linux Kernel (Live Patch 33 for SLE 12)
Affected: Ubuntu:14.04:LTS: linux-aws, Ubuntu:14.04:LTS: linux-azure, Ubuntu:14.04:LTS: linux-lts-xenial, Ubuntu:Pro:14.04:LTS: linux, Ubuntu:16.04:LTS: linux, Ubuntu:16.04:LTS: linux-aws, Ubuntu:16.04:LTS: linux-azure, Ubuntu:16.04:LTS: linux-gcp, Ubuntu:16.04:LTS: linux-hwe, Ubuntu:16.04:LTS: linux-kvm and 23 more
A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilege(CPL) level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside guest.