CVE-2015-5697

This kernel update provides an upgrade to the upstream 4.1 longterm kernel series, currently based on 4.1.8 and resolves at least the following security issues:

It was found that the Linux kernel's keyring implementation would leak memory when adding a key to a keyring via the add_key() function. A local attacker could use this flaw to exhaust all available memory on the system. (CVE-2015-1333)

A flaw was found in the Linux kernel where the deletion of a file or directory could trigger an unmount and reveal data under a mount point. This flaw was inadvertently introduced with the new feature of being able to lazily unmount a mount tree when using file system user namespaces. (CVE-2015-4176)

A flaw was discovered in the kernel's collect_mounts function. If the kernel audit subsystem called collect_mounts to audit an unmounted path, it could panic the system. With this flaw, an unprivileged user could call umount (MNT_DETACH) to launch a denial-of-service attack. (CVE-2015-4177)

A flaw was found in the Linux kernel which is related to the user namespace lazily unmounting file systems. The fs_pin struct has two members (m_list and s_list) which are usually initialized on use in the pin_insert_group function. However, these members might go unmodified; in this case, the system panics when it attempts to destroy or free them. This flaw could be used to launch a denial-of-service attack. (CVE-2015-4178)

A DoS flaw was found for a Linux kernel built for the x86 architecture which had the KVM virtualization support(CONFIG_KVM) enabled. The kernel would be vulnerable to a NULL pointer dereference flaw in Linux kernel's kvm_apic_has_events() function while doing an ioctl. An unprivileged user able to access the "/dev/kvm" device could use this flaw to crash the system kernel. (CVE-2015-4692)

A flaw was found in the kernel's implementation of the Berkeley Packet Filter (BPF). A local attacker could craft BPF code to crash the system by creating a situation in which the JIT compiler would fail to correctly optimize the JIT image on the last pass. This would lead to the CPU executing instructions that were not part of the JIT code. (CVE-2015-4700)

The get_bitmap_file function in drivers/md/md.c in the Linux kernel before 4.1.6 does not initialize a certain bitmap data structure, which allows local users to obtain sensitive information from kernel memory via a GET_BITMAP_FILE ioctl call. (CVE-2015-5697)

Use-after-free vulnerability in the path_openat function in fs/namei.c in the Linux kernel 3.x and 4.x before 4.0.4 allows local users to cause a denial of service or possibly have unspecified other impact via O_TMPFILE filesystem operations that leverage a duplicate cleanup operation. (CVE-2015-5706)

It was discovered that an integer overflow error existed in the SCSIgeneric (sg) driver in the Linux kernel. A local attacker with writepermission to a SCSI generic device could use this to cause a denial of service (system crash) or potentially escalate their privileges. (CVE-2015-5707)

Additionally the following packages have been updated to add or improve support for the 4.1 series kernels: btrfs-progs, iproute2, xtables-addons, nvidia304, nvidia340, kernel-firmware-nonfree, radeon-firmware.

For other changes, see the referenced changelogs:

This kernel-linus update provides an upgrade to the upstream 4.1 longterm kernel series, currently based on 4.1.8 and resolves at least the following security issues:

It was found that the Linux kernel's keyring implementation would leak memory when adding a key to a keyring via the add_key() function. A local attacker could use this flaw to exhaust all available memory on the system. (CVE-2015-1333)

A flaw was found in the Linux kernel where the deletion of a file or directory could trigger an unmount and reveal data under a mount point. This flaw was inadvertently introduced with the new feature of being able to lazily unmount a mount tree when using file system user namespaces. (CVE-2015-4176)

A flaw was discovered in the kernel's collect_mounts function. If the kernel audit subsystem called collect_mounts to audit an unmounted path, it could panic the system. With this flaw, an unprivileged user could call umount (MNT_DETACH) to launch a denial-of-service attack. (CVE-2015-4177)

A flaw was found in the Linux kernel which is related to the user namespace lazily unmounting file systems. The fs_pin struct has two members (m_list and s_list) which are usually initialized on use in the pin_insert_group function. However, these members might go unmodified; in this case, the system panics when it attempts to destroy or free them. This flaw could be used to launch a denial-of-service attack. (CVE-2015-4178)

A DoS flaw was found for a Linux kernel built for the x86 architecture which had the KVM virtualization support(CONFIG_KVM) enabled. The kernel would be vulnerable to a NULL pointer dereference flaw in Linux kernel's kvm_apic_has_events() function while doing an ioctl. An unprivileged user able to access the "/dev/kvm" device could use this flaw to crash the system kernel. (CVE-2015-4692)

A flaw was found in the kernel's implementation of the Berkeley Packet Filter (BPF). A local attacker could craft BPF code to crash the system by creating a situation in which the JIT compiler would fail to correctly optimize the JIT image on the last pass. This would lead to the CPU executing instructions that were not part of the JIT code. (CVE-2015-4700)

The get_bitmap_file function in drivers/md/md.c in the Linux kernel before 4.1.6 does not initialize a certain bitmap data structure, which allows local users to obtain sensitive information from kernel memory via a GET_BITMAP_FILE ioctl call. (CVE-2015-5697)

Use-after-free vulnerability in the path_openat function in fs/namei.c in the Linux kernel 3.x and 4.x before 4.0.4 allows local users to cause a denial of service or possibly have unspecified other impact via O_TMPFILE filesystem operations that leverage a duplicate cleanup operation. (CVE-2015-5706)

It was discovered that an integer overflow error existed in the SCSIgeneric (sg) driver in the Linux kernel. A local attacker with writepermission to a SCSI generic device could use this to cause a denial of service (system crash) or potentially escalate their privileges. (CVE-2015-5707)

For other changes, see the referenced changelogs:

This kernel-tmb update provides an upgrade to the upstream 4.1 longterm kernel series, currently based on 4.1.15 and resolves at least the following security issues:

It was found that the Linux kernel's keyring implementation would leak memory when adding a key to a keyring via the add_key() function. A local attacker could use this flaw to exhaust all available memory on the system. (CVE-2015-1333)

A flaw was found in the Linux kernel where the deletion of a file or directory could trigger an unmount and reveal data under a mount point. This flaw was inadvertently introduced with the new feature of being able to lazily unmount a mount tree when using file system user namespaces. (CVE-2015-4176)

A flaw was discovered in the kernel's collect_mounts function. If the kernel audit subsystem called collect_mounts to audit an unmounted path, it could panic the system. With this flaw, an unprivileged user could call umount (MNT_DETACH) to launch a denial-of-service attack. (CVE-2015-4177)

A flaw was found in the Linux kernel which is related to the user namespace lazily unmounting file systems. The fs_pin struct has two members (m_list and s_list) which are usually initialized on use in the pin_insert_group function. However, these members might go unmodified; in this case, the system panics when it attempts to destroy or free them. This flaw could be used to launch a denial-of-service attack. (CVE-2015-4178)

A DoS flaw was found for a Linux kernel built for the x86 architecture which had the KVM virtualization support(CONFIG_KVM) enabled. The kernel would be vulnerable to a NULL pointer dereference flaw in Linux kernel's kvm_apic_has_events() function while doing an ioctl. An unprivileged user able to access the "/dev/kvm" device could use this flaw to crash the system kernel. (CVE-2015-4692)

A flaw was found in the kernel's implementation of the Berkeley Packet Filter (BPF). A local attacker could craft BPF code to crash the system by creating a situation in which the JIT compiler would fail to correctly optimize the JIT image on the last pass. This would lead to the CPU executing instructions that were not part of the JIT code. (CVE-2015-4700)

The virtnet_probe function in drivers/net/virtio_net.c in the Linux kernel before 4.2 attempts to support a FRAGLIST feature without proper memory allocation, which allows guest OS users to cause a denial of service (buffer overflow and memory corruption) via a crafted sequence of fragmented packets. (CVE-2015-5156)

Moein Ghasemzadeh discovered that the USB WhiteHEAT serial driver contained hardcoded attributes about the USB devices. An attacker could construct a fake WhiteHEAT USB device that, when inserted, causes a denial of service (system crash) (CVE-2015-5257).

A guest to host DoS issue was found affecting various hypervisors. In that, a guest can DoS the host by triggering an infinite stream of "alignment check" (#AC) exceptions. This causes the microcode to enter an infinite loop where the core never receives another interrupt. The host kernel panics due to this effect (CVE-2015-5307).

The get_bitmap_file function in drivers/md/md.c in the Linux kernel before 4.1.6 does not initialize a certain bitmap data structure, which allows local users to obtain sensitive information from kernel memory via a GET_BITMAP_FILE ioctl call. (CVE-2015-5697)

Use-after-free vulnerability in the path_openat function in fs/namei.c in the Linux kernel 3.x and 4.x before 4.0.4 allows local users to cause a denial of service or possibly have unspecified other impact via O_TMPFILE filesystem operations that leverage a duplicate cleanup operation. (CVE-2015-5706)

It was discovered that an integer overflow error existed in the SCSIgeneric (sg) driver in the Linux kernel. A local attacker with writepermission to a SCSI generic device could use this to cause a denial of service (system crash) or potentially escalate their privileges. (CVE-2015-5707)

The __rds_conn_create function in…

The SUSE Linux Enterprise 12 kernel was updated to 3.12.48-52.27 to receive various security and bugfixes.

Following security bugs were fixed:

• CVE-2015-7613: A flaw was found in the Linux kernel IPC code that could lead to arbitrary code execution. The ipc_addid() function initialized a shared object that has unset uid/gid values. Since the fields are not initialized, the check can falsely succeed. (bsc#948536)
• CVE-2015-5156: When a guests KVM network devices is in a bridge configuration the kernel can create a situation in which packets are fragmented in an unexpected fashion. The GRO functionality can create a situation in which multiple SKB's are chained together in a single packets fraglist (by design). (bsc#940776)
• CVE-2015-5157: arch/x86/entry/entry_64.S in the Linux kernel before 4.1.6 on the x86_64 platform mishandles IRET faults in processing NMIs that occurred during userspace execution, which might allow local users to gain privileges by triggering an NMI (bsc#938706).
• CVE-2015-6252: A flaw was found in the way the Linux kernel's vhost driver treated userspace provided log file descriptor when processing the VHOST_SET_LOG_FD ioctl command. The file descriptor was never released and continued to consume kernel memory. A privileged local user with access to the /dev/vhost-net files could use this flaw to create a denial-of-service attack (bsc#942367).
• CVE-2015-5697: The get_bitmap_file function in drivers/md/md.c in the Linux kernel before 4.1.6 does not initialize a certain bitmap data structure, which allows local users to obtain sensitive information from kernel memory via a GET_BITMAP_FILE ioctl call. (bnc#939994)
• CVE-2015-6937: A NULL pointer dereference flaw was found in the Reliable Datagram Sockets (RDS) implementation allowing a local user to cause system DoS. A verification was missing that the underlying transport exists when a connection was created. (bsc#945825)
• CVE-2015-5283: A NULL pointer dereference flaw was found in SCTP implementation allowing a local user to cause system DoS. Creation of multiple sockets in parallel when system doesn't have SCTP module loaded can lead to kernel panic. (bsc#947155)

The following non-security bugs were fixed:

• ALSA: hda - Abort the probe without i915 binding for HSW/BDW (bsc#936556).
• Btrfs: Backport subvolume mount option handling (bsc#934962)
• Btrfs: Handle unaligned length in extent_same (bsc#937609).
• Btrfs: advertise which crc32c implementation is being used on mount (bsc#946057).
• Btrfs: allow mounting btrfs subvolumes with different ro/rw options.
• Btrfs: check if previous transaction aborted to avoid fs corruption (bnc#942509).
• Btrfs: clean up error handling in mount_subvol() (bsc#934962).
• Btrfs: cleanup orphans while looking up default subvolume (bsc#914818).
• Btrfs: do not update mtime/ctime on deduped inodes (bsc#937616).
• Btrfs: fail on mismatched subvol and subvolid mount options (bsc#934962).
• Btrfs: fix chunk allocation regression leading to transaction abort (bnc#938550).
• Btrfs: fix clone / extent-same deadlocks (bsc#937612).
• Btrfs: fix crash on close_ctree() if cleaner starts new transaction (bnc#938891).
• Btrfs: fix deadlock with extent-same and readpage (bsc#937612).
• Btrfs: fix file corruption after cloning inline extents (bnc#942512).
• Btrfs: fix file read corruption after extent cloning and fsync (bnc#946902).
• Btrfs: fix find_free_dev_extent() malfunction in case device tree has hole (bnc#938550).
• Btrfs: fix hang when failing to submit bio of directIO (bnc#942685).
• Btrfs: fix list transaction->pending_ordered corruption (bnc#938893).
• Btrfs: fix memory corruption on failure to submit bio for direct IO (bnc#942685).
• Btrfs: fix memory leak in the extent_same ioctl (bsc#937613).
• Btrfs: fix put dio bio twice when we submit dio bio fail (bnc#942685).
• Btrfs: fix race between balance and unused block group deletion (bnc#938892). -…

The SUSE Linux Enterprise 11 SP4 Realtime kernel was updated to version 3.0.101.rt130-45.1 to receive various security and bugfixes.

Following security bugs were fixed:

• CVE-2015-6252: Possible file descriptor leak for each VHOST_SET_LOG_FDcommand issued, this could eventually wasting available system resources and creating a denial of service (bsc#942367).
• CVE-2015-5707: Possible integer overflow in the calculation of total number of pages in bio_map_user_iov() (bsc#940338).
• CVE-2015-5364: The (1) udp_recvmsg and (2) udpv6_recvmsg functions in the Linux kernel before 4.0.6 do not properly consider yielding a processor, which allowed remote attackers to cause a denial of service (system hang) via incorrect checksums within a UDP packet flood (bnc#936831).
• CVE-2015-5366: The (1) udp_recvmsg and (2) udpv6_recvmsg functions in the Linux kernel before 4.0.6 provide inappropriate -EAGAIN return values, which allowed remote attackers to cause a denial of service (EPOLLET epoll application read outage) via an incorrect checksum in a UDP packet, a different vulnerability than CVE-2015-5364 (bnc#936831).
• CVE-2015-1420: Race condition in the handle_to_path function in fs/fhandle.c in the Linux kernel through 3.19.1 allowed local users to bypass intended size restrictions and trigger read operations on additional memory locations by changing the handle_bytes value of a file handle during the execution of this function (bnc#915517).
• CVE-2015-4700: The bpf_int_jit_compile function in arch/x86/net/bpf_jit_comp.c in the Linux kernel before 4.0.6 allowed local users to cause a denial of service (system crash) by creating a packet filter and then loading crafted BPF instructions that trigger late convergence by the JIT compiler (bnc#935705).
• CVE-2015-5697: The get_bitmap_file function in drivers/md/md.c in the Linux kernel before 4.1.6 does not initialize a certain bitmap data structure, which allows local users to obtain sensitive information from kernel memory via a GET_BITMAP_FILE ioctl call. (bnc#939994)

The following non-security bugs were fixed:

• Btrfs: be aware of btree inode write errors to avoid fs corruption (bnc#942350).
• Btrfs: be aware of btree inode write errors to avoid fs corruption (bnc#942404).
• Btrfs: check if previous transaction aborted to avoid fs corruption (bnc#942350).
• Btrfs: check if previous transaction aborted to avoid fs corruption (bnc#942404).
• Btrfs: deal with convert_extent_bit errors to avoid fs corruption (bnc#942350).
• Btrfs: deal with convert_extent_bit errors to avoid fs corruption (bnc#942404).
• Btrfs: fix hang when failing to submit bio of directIO (bnc#942688).
• Btrfs: fix memory corruption on failure to submit bio for direct IO (bnc#942688).
• Btrfs: fix put dio bio twice when we submit dio bio fail (bnc#942688).
• DRM/I915: Add enum hpd_pin to intel_encoder (bsc#942938).
• DRM/i915: Convert HPD interrupts to make use of HPD pin assignment in encoders (v2) (bsc#942938).
• DRM/i915: Get rid if the 'hotplug_supported_mask' in struct drm_i915_private (bsc#942938).
• DRM/i915: Remove i965_hpd_irq_setup (bsc#942938).
• DRM/i915: Remove valleyview_hpd_irq_setup (bsc#942938).
• CIFS: Fix missing crypto allocation (bnc#937402).
• IB/core: Fix mismatch between locked and pinned pages (bnc#937855).
• IB/iser: Add Discovery support (bsc#923002).
• IB/iser: Move informational messages from error to info level (bsc#923002).
• SCSI: Moved iscsi kabi patch to patches.kabi (bsc#923002)
• SCSI: kabi: allow iscsi disocvery session support (bsc#923002).
• SCSI: vmw_pvscsi: Fix pvscsi_abort() function (bnc#940398 bsc#930934).
• SCSI: fix scsi_error_handler vs. scsi_host_dev_release race (bnc#942204).
• SCSI: scsi_error: add missing case statements in scsi_decide_disposition() (bsc#920733).
• SCSI: scsi_transport_iscsi: Exporting new attrs for iscsi session and connection in sysfs (bsc#923002).
• NFSD: Fix nfsv4 opcode decoding…

The get_bitmap_file function in drivers/md/md.c in the Linux kernel before 4.1.6 does not initialize a certain bitmap data structure, which allows local users to obtain sensitive information from kernel memory via a GET_BITMAP_FILE ioctl call.

Benjamin Randazzo discovered an information leak in the md (multiple device) driver when the bitmap_info.file is disabled. A local privileged attacker could use this to obtain sensitive information from the kernel. (CVE-2015-5697)

Marc-André Lureau discovered that the vhost driver did not properly release the userspace provided log file descriptor. A privileged attacker could use this to cause a denial of service (resource exhaustion). (CVE-2015-6252)

Benjamin Randazzo discovered an information leak in the md (multiple device) driver when the bitmap_info.file is disabled. A local privileged attacker could use this to obtain sensitive information from the kernel. (CVE-2015-5697)

Marc-André Lureau discovered that the vhost driver did not properly release the userspace provided log file descriptor. A privileged attacker could use this to cause a denial of service (resource exhaustion). (CVE-2015-6252)

It was discovered that virtio networking in the Linux kernel did not handle fragments correctly, leading to kernel memory corruption. A remote attacker could use this to cause a denial of service (system crash) or possibly execute code with administrative privileges. (CVE-2015-5156)

Benjamin Randazzo discovered an information leak in the md (multiple device) driver when the bitmap_info.file is disabled. A local privileged attacker could use this to obtain sensitive information from the kernel. (CVE-2015-5697)

Marc-André Lureau discovered that the vhost driver did not properly release the userspace provided log file descriptor. A privileged attacker could use this to cause a denial of service (resource exhaustion). (CVE-2015-6252)

It was discovered that the Reliable Datagram Sockets (RDS) implementation in the Linux kernel did not verify sockets were properly bound before attempting to send a message, which could cause a NULL pointer dereference. An attacker could use this to cause a denial of service (system crash). (CVE-2015-6937)

Ben Hutchings discovered that the Advanced Union Filesystem (aufs) for the Linux kernel did not correctly handle references of memory mapped files from an aufs mount. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2015-7312)