An issue was discovered in the fd_locked_ioctl function in drivers/block/floppy.c in the Linux kernel through 4.15.7. The floppy driver will copy a kernel pointer to user memory in response to the FDGETPRM ioctl. An attacker can send the FDGETPRM ioctl and use the obtained kernel pointer to discover the location of kernel code and data and bypass kernel security protections such as KASLR.

An issue was discovered in the fd_locked_ioctl function in drivers/block/floppy.c in the Linux kernel through 4.15.7. The floppy driver will copy a kernel pointer to user memory in response to the FDGETPRM ioctl. An attacker can send the FDGETPRM ioctl and use the obtained kernel pointer to discover the location of kernel code and data and bypass kernel security protections such as KASLR.

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

Affected: Ubuntu:14.04:LTS: linux, Ubuntu:14.04:LTS: linux-aws, Ubuntu:14.04:LTS: linux-lts-xenial, 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, Ubuntu:16.04:LTS: linux-oem and 23 more

An issue was discovered in the fd_locked_ioctl function in drivers/block/floppy.c in the Linux kernel through 4.15.7. The floppy driver will copy a kernel pointer to user memory in response to the FDGETPRM ioctl. An attacker can send the FDGETPRM ioctl and use the obtained kernel pointer to discover the location of kernel code and data and bypass kernel security protections such as KASLR.

Ein lokaler Angreifer kann eine Schwachstelle in Linux Kernel ausnutzen, um Sicherheitsvorkehrungen zu umgehen.