CVE-2015-8709

kernel/ptrace.c in the Linux kernel through 4.4.1 mishandles uid and gid mappings, which allows local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states "there is no kernel bug here.

kernel/ptrace.c in the Linux kernel through 4.4.1 mishandles uid and gid mappings, which allows local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states "there is no kernel bug here.

The SUSE Linux Enterprise 12 kernel was updated to 3.12.55 to receive various security and bugfixes.

Features added:

• A improved XEN blkfront module was added, which allows more I/O bandwidth. (FATE#320625) It is called xen-blkfront in PV, and xen-vbd-upstream in HVM mode.

The following security bugs were fixed:

• CVE-2013-7446: Use-after-free vulnerability in net/unix/af_unix.c in the Linux kernel allowed local users to bypass intended AF_UNIX socket permissions or cause a denial of service (panic) via crafted epoll_ctl calls (bnc#955654).
• CVE-2015-5707: Integer overflow in the sg_start_req function in drivers/scsi/sg.c in the Linux kernel allowed local users to cause a denial of service or possibly have unspecified other impact via a large iov_count value in a write request (bnc#940338).
• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here' (bnc#959709 bnc#960561).
• CVE-2015-8767: net/sctp/sm_sideeffect.c in the Linux kernel did not properly manage the relationship between a lock and a socket, which allowed local users to cause a denial of service (deadlock) via a crafted sctp_accept call (bnc#961509).
• CVE-2015-8785: The fuse_fill_write_pages function in fs/fuse/file.c in the Linux kernel allowed local users to cause a denial of service (infinite loop) via a writev system call that triggers a zero length for the first segment of an iov (bnc#963765).
• CVE-2015-8812: A use-after-free flaw was found in the CXGB3 kernel driver when the network was considered to be congested. This could be used by local attackers to cause machine crashes or potentially code executuon (bsc#966437).
• CVE-2016-0723: Race condition in the tty_ioctl function in drivers/tty/tty_io.c in the Linux kernel allowed local users to obtain sensitive information from kernel memory or cause a denial of service (use-after-free and system crash) by making a TIOCGETD ioctl call during processing of a TIOCSETD ioctl call (bnc#961500).
• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964730).
• CVE-2016-2069: Race conditions in TLB syncing was fixed which could leak to information leaks (bnc#963767).
• CVE-2016-2384: A double-free triggered by invalid USB descriptor in ALSA usb-audio was fixed, which could be exploited by physical local attackers to crash the kernel or gain code execution (bnc#966693).

The following non-security bugs were fixed:

• alsa: rawmidi: Make snd_rawmidi_transmit() race-free (bsc#968018).
• alsa: seq: Fix leak of pool buffer at concurrent writes (bsc#968018).
• be2net: fix some log messages (bnc#855062 FATE#315961, bnc#867583).
• block: xen-blkfront: Fix possible NULL ptr dereference (bsc#957986 fate#320625).
• btrfs: Add handler for invalidate page (bsc#963193).
• btrfs: check prepare_uptodate_page() error code earlier (bnc#966910).
• btrfs: delayed_ref: Add new function to record reserved space into delayed ref (bsc#963193).
• btrfs: delayed_ref: release and free qgroup reserved at proper timing (bsc#963193).
• btrfs: extent_io: Introduce needed structure for recoding set/clear bits (bsc#963193).
• btrfs: extent_io: Introduce new function clear_record_extent_bits() (bsc#963193).
• btrfs: extent_io: Introduce new function set_record_extent_bits (bsc#963193).
• btrfs: extent-tree: Add new version of btrfs_check_data_free_space and btrfs_free_reserved_data_space (bsc#963193).
• btrfs: extent-tree: Add new version of btrfs_delalloc_reserve/release_space (bsc#963193).
• btrfs: extent-tree: Switch to new check_data_free_space and free_reserved_data_space (bsc#963193).
• btrfs: extent-tree: Switch to new delalloc space reserve and release…

The SUSE Linux Enterprise 12 SP1 kernel was updated to 3.12.57 to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966437)
• CVE-2015-8816: A malicious USB device could cause a kernel crash in the USB hub driver. (bnc#968010).
• CVE-2016-2143: On zSeries a fork of a large process could have caused memory corruption due to incorrect page table handling. (bnc#970504)
• CVE-2016-2184: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#971125).
• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#966693)
• CVE-2016-2782: A malicious USB device could cause a kernel crash in the usb visor driver. (bnc#968670).
• CVE-2016-3139: A malicious USB device could cause a kernel crash in the wacom driver. (bnc#970909).
• CVE-2016-3156: Removal of ipv4 interfaces with a large number of IP addresses was taking very long. (bsc#971360).
• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here (bnc#960561).

The following non-security bugs were fixed:

• aacraid: Refresh patches.drivers/0005-aacraid-MSI-x-support.patch. (boo#970249)
• acpi: processor: Introduce apic_id in struct processor to save parsed APIC id (bsc#959463).
• alsa: rawmidi: Make snd_rawmidi_transmit() race-free (bsc#968018).
• alsa: seq: Fix leak of pool buffer at concurrent writes (bsc#968018).
• btrfs: Account data space in more proper timing: (bsc#963193).
• btrfs: Add handler for invalidate page (bsc#963193).
• btrfs: check prepare_uptodate_page() error code earlier (bnc#966910).
• btrfs: delayed_ref: Add new function to record reserved space into delayed ref (bsc#963193).
• btrfs: delayed_ref: release and free qgroup reserved at proper timing (bsc#963193).
• btrfs: extent_io: Introduce needed structure for recoding set/clear bits (bsc#963193).
• btrfs: extent_io: Introduce new function clear_record_extent_bits() (bsc#963193).
• btrfs: extent_io: Introduce new function set_record_extent_bits (bsc#963193).
• btrfs: extent-tree: Add new version of btrfs_check_data_free_space and btrfs_free_reserved_data_space (bsc#963193).
• btrfs: extent-tree: Add new version of btrfs_delalloc_reserve/release_space (bsc#963193).
• btrfs: extent-tree: Switch to new check_data_free_space and free_reserved_data_space (bsc#963193).
• btrfs: extent-tree: Switch to new delalloc space reserve and release (bsc#963193).
• btrfs: fallocate: Added a prerequisite patch and rebased the chunks that had previously been taken from it. Fixes a warning we had in fs/btrfs/file.c.
• btrfs: fallocate: Add support to accurate qgroup reserve (bsc#963193).
• btrfs: fix invalid page accesses in extent_same (dedup) ioctl (bnc#968230).
• btrfs: fix page reading in extent_same ioctl leading to csum errors (bnc#968230).
• btrfs: fix warning in backref walking (bnc#966278).
• btrfs: qgroup: Add handler for NOCOW and inline (bsc#963193).
• btrfs: qgroup: Add new trace point for qgroup data reserve (bsc#963193).
• btrfs: qgroup: Avoid calling btrfs_free_reserved_data_space in clear_bit_hook (bsc#963193).
• btrfs: qgroup: Check if qgroup reserved space leaked (bsc#963193).
• btrfs: qgroup: Cleanup old inaccurate facilities (bsc#963193).
• btrfs: qgroup: Fix a race in delayed_ref which leads to abort trans…

This update for the Linux Kernel 3.12.49-11.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

This update for the Linux Kernel 3.12.51-60.20.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

This update for the Linux Kernel 3.12.53-60.30.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

This update for the Linux Kernel 3.12.51-52.39.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

This update for the Linux Kernel 3.12.51-60.25.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

This update for the Linux Kernel 3.12.44-52.18.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

This update for the Linux Kernel 3.12.44-52.10.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

This update for the Linux Kernel 3.12.51-52.31.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

This update for the Linux Kernel 3.12.39-47.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

This update for the Linux Kernel 3.12.48-52.27.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

This update for the Linux Kernel 3.12.51-52.34.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

This update for the Linux Kernel 3.12.43-52.6.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

The SUSE Linux Enterprise 12 SP1 Realtime kernel was updated to 3.12.58 to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2015-7566: The treo_attach function in drivers/usb/serial/visor.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact by inserting a USB device that lacks a (1) bulk-in or (2) interrupt-in endpoint (bnc#961512).
• CVE-2015-8550: Xen, when used on a system providing PV backends, allowed local guest OS administrators to cause a denial of service (host OS crash) or gain privileges by writing to memory shared between the frontend and backend, aka a double fetch vulnerability (bsc#957988).
• CVE-2015-8551: The PCI backend driver in Xen, when running on an x86 system, allowed local guest administrators to hit BUG conditions and cause a denial of service (NULL pointer dereference and host OS crash) by leveraging a system with access to a passed-through MSI or MSI-X capable physical PCI device and a crafted sequence of XEN_PCI_OP_* operations, aka 'Linux pciback missing sanity checks (bsc#957990).
• CVE-2015-8551: The pci backend driver in Xen, when running on an x86 system and using Linux 3.1.x through 4.3.x as the driver domain, allowed local guest administrators to hit BUG conditions and cause a denial of service (NULL pointer dereference and host OS crash) by leveraging a system with access to a passed-through MSI or MSI-X capable physical PCI device and a crafted sequence of XEN_PCI_OP_* operations, aka 'Linux pciback missing sanity checks (bnc#957990).
• CVE-2015-8552: The PCI backend driver in Xen, when running on an x86 system, allowed local guest administrators to generate a continuous stream of WARN messages and cause a denial of service (disk consumption) by leveraging a system with access to a passed-through MSI or MSI-X capable physical PCI device and XEN_PCI_OP_enable_msi operations, aka 'Linux pciback missing sanity checks (bsc#957990).
• CVE-2015-8552: The pci backend driver in Xen, when running on an x86 system and using Linux 3.1.x through 4.3.x as the driver domain, allowed local guest administrators to generate a continuous stream of WARN messages and cause a denial of service (disk consumption) by leveraging a system with access to a passed-through MSI or MSI-X capable physical PCI device and XEN_PCI_OP_enable_msi operations, aka 'Linux pciback missing sanity checks (bnc#957990).
• CVE-2015-8709: ** DISPUTED ** kernel/ptrace.c in the Linux kernel mishandles uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. Upstream states that there is no kernel bug here (bnc#960561).
• CVE-2015-8785: The fuse_fill_write_pages function in fs/fuse/file.c allowed local users to cause a denial of service (infinite loop) via a writev system call that triggers a zero length for the first segment of an iov (bsc#963765).
• CVE-2015-8812: drivers/infiniband/hw/cxgb3/iwch_cm.c did not properly identify error conditions, which allowed remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via crafted packets (bsc#966437).
• CVE-2015-8816: The hub_activate function in drivers/usb/core/hub.c did not properly maintain a hub-interface data structure, which allowed physically proximate attackers to cause a denial of service (invalid memory access and system crash) or possibly have unspecified other impact by unplugging a USB hub device (bsc#968010).
• CVE-2015-8816: The hub_activate function in drivers/usb/core/hub.c in the Linux kernel did not properly maintain a hub-interface data structure, which allowed physically proximate attackers to cause a denial of service (invalid…

The SUSE Linux Enterprise 12 SP2 kernel was updated to 4.4.49 to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2016-7117: Use-after-free vulnerability in the __sys_recvmmsg function in net/socket.c in the Linux kernel allowed remote attackers to execute arbitrary code via vectors involving a recvmmsg system call that was mishandled during error processing (bnc#1003077).
• CVE-2017-5576: Integer overflow in the vc4_get_bcl function in drivers/gpu/drm/vc4/vc4_gem.c in the VideoCore DRM driver in the Linux kernel allowed local users to cause a denial of service or possibly have unspecified other impact via a crafted size value in a VC4_SUBMIT_CL ioctl call (bnc#1021294).
• CVE-2017-5577: The vc4_get_bcl function in drivers/gpu/drm/vc4/vc4_gem.c in the VideoCore DRM driver in the Linux kernel did not set an errno value upon certain overflow detections, which allowed local users to cause a denial of service (incorrect pointer dereference and OOPS) via inconsistent size values in a VC4_SUBMIT_CL ioctl call (bnc#1021294).
• CVE-2017-5551: The simple_set_acl function in fs/posix_acl.c in the Linux kernel preserved the setgid bit during a setxattr call involving a tmpfs filesystem, which allowed local users to gain group privileges by leveraging the existence of a setgid program with restrictions on execute permissions. (bnc#1021258).
• CVE-2017-2583: The load_segment_descriptor implementation in arch/x86/kvm/emulate.c in the Linux kernel improperly emulated a 'MOV SS, NULL selector' instruction, which allowed guest OS users to cause a denial of service (guest OS crash) or gain guest OS privileges via a crafted application (bnc#1020602).
• CVE-2017-2584: arch/x86/kvm/emulate.c in the Linux kernel allowed local users to obtain sensitive information from kernel memory or cause a denial of service (use-after-free) via a crafted application that leverages instruction emulation for fxrstor, fxsave, sgdt, and sidt (bnc#1019851).
• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here' (bnc#1010933).
• CVE-2016-9806: Race condition in the netlink_dump function in net/netlink/af_netlink.c in the Linux kernel allowed local users to cause a denial of service (double free) or possibly have unspecified other impact via a crafted application that made sendmsg system calls, leading to a free operation associated with a new dump that started earlier than anticipated (bnc#1013540).
• CVE-2017-5897: fixed a bug in the Linux kernel IPv6 implementation which allowed remote attackers to trigger an out-of-bounds access, leading to a denial-of-service attack (bnc#1023762).
• CVE-2017-5970: Fixed a possible denial-of-service that could have been triggered by sending bad IP options on a socket (bsc#1024938).
• CVE-2017-5986: an application could have triggered a BUG_ON() in sctp_wait_for_sndbuf() if the socket TX buffer was full, a thread was waiting on it to queue more data, and meanwhile another thread peeled off the association being used by the first thread (bsc#1025235).

The following non-security bugs were fixed:

• 8250: fintek: rename IRQ_MODE macro (boo#1009546).
• acpi: nfit, libnvdimm: fix / harden ars_status output length handling (bsc#1023175).
• acpi: nfit: fix bus vs dimm confusion in xlat_status (bsc#1023175).
• acpi: nfit: validate ars_status output buffer size (bsc#1023175).
• arm64: numa: fix incorrect log for memory-less node (bsc#1019631).
• asoc: cht_bsw_rt5645: Fix leftover kmalloc (bsc#1010690).
• asoc: rt5670: add HS ground control (bsc#1016250).
• bcache: Make gc wakeup sane, remove set_task_state() (bsc#1021260).
• bcache: partition support:…

Felix Wilhelm discovered a race condition in the Xen paravirtualized drivers which can cause double fetch vulnerabilities. An attacker in the paravirtualized guest could exploit this flaw to cause a denial of service (crash the host) or potentially execute arbitrary code on the host. (CVE-2015-8550)

Konrad Rzeszutek Wilk discovered the Xen PCI backend driver does not perform consistency checks on the device's state. An attacker could exploit this flaw to cause a denial of service (NULL dereference) on the host. (CVE-2015-8551)

Konrad Rzeszutek Wilk discovered the Xen PCI backend driver does not perform consistency checks on the device's state. An attacker could exploit this flaw to cause a denial of service by flooding the logging system with WARN() messages causing the initial domain to exhaust disk space. (CVE-2015-8552)

Jann Horn discovered a ptrace issue with user namespaces in the Linux kernel. The namespace owner could potentially exploit this flaw by ptracing a root owned process entering the user namespace to elevate its privileges and potentially gain access outside of the namespace. (http://bugs.launchpad.net/bugs/1527374, CVE-2015-8709)

Felix Wilhelm discovered a race condition in the Xen paravirtualized drivers which can cause double fetch vulnerabilities. An attacker in the paravirtualized guest could exploit this flaw to cause a denial of service (crash the host) or potentially execute arbitrary code on the host. (CVE-2015-8550)

Konrad Rzeszutek Wilk discovered the Xen PCI backend driver does not perform consistency checks on the device's state. An attacker could exploit this flaw to cause a denial of service (NULL dereference) on the host. (CVE-2015-8551)

Konrad Rzeszutek Wilk discovered the Xen PCI backend driver does not perform consistency checks on the device's state. An attacker could exploit this flaw to cause a denial of service by flooding the logging system with WARN() messages causing the initial domain to exhaust disk space. (CVE-2015-8552)

Jann Horn discovered a ptrace issue with user namespaces in the Linux kernel. The namespace owner could potentially exploit this flaw by ptracing a root owned process entering the user namespace to elevate its privileges and potentially gain access outside of the namespace. (http://bugs.launchpad.net/bugs/1527374, CVE-2015-8709)

Felix Wilhelm discovered a race condition in the Xen paravirtualized drivers which can cause double fetch vulnerabilities. An attacker in the paravirtualized guest could exploit this flaw to cause a denial of service (crash the host) or potentially execute arbitrary code on the host. (CVE-2015-8550)

Konrad Rzeszutek Wilk discovered the Xen PCI backend driver does not perform consistency checks on the device's state. An attacker could exploit this flaw to cause a denial of service (NULL dereference) on the host. (CVE-2015-8551)

Konrad Rzeszutek Wilk discovered the Xen PCI backend driver does not perform consistency checks on the device's state. An attacker could exploit this flaw to cause a denial of service by flooding the logging system with WARN() messages causing the initial domain to exhaust disk space. (CVE-2015-8552)

Jann Horn discovered a ptrace issue with user namespaces in the Linux kernel. The namespace owner could potentially exploit this flaw by ptracing a root owned process entering the user namespace to elevate its privileges and potentially gain access outside of the namespace. (http://bugs.launchpad.net/bugs/1527374, CVE-2015-8709)

Felix Wilhelm discovered a race condition in the Xen paravirtualized drivers which can cause double fetch vulnerabilities. An attacker in the paravirtualized guest could exploit this flaw to cause a denial of service (crash the host) or potentially execute arbitrary code on the host. (CVE-2015-8550)

Konrad Rzeszutek Wilk discovered the Xen PCI backend driver does not perform consistency checks on the device's state. An attacker could exploit this flaw to cause a denial of service (NULL dereference) on the host. (CVE-2015-8551)

Konrad Rzeszutek Wilk discovered the Xen PCI backend driver does not perform consistency checks on the device's state. An attacker could exploit this flaw to cause a denial of service by flooding the logging system with WARN() messages causing the initial domain to exhaust disk space. (CVE-2015-8552)

Jann Horn discovered a ptrace issue with user namespaces in the Linux kernel. The namespace owner could potentially exploit this flaw by ptracing a root owned process entering the user namespace to elevate its privileges and potentially gain access outside of the namespace. (http://bugs.launchpad.net/bugs/1527374, CVE-2015-8709)