readykernel-patch-116.7-125.0-1.vl7

Kernel Update Version:
3.10.0-1062.4.2.vz7.116.7
Release Date:
2021-04-05 08:06:01
  • CVE-2021-27365

    Heap buffer overflow in the iSCSI subsystem.

    It was discovered that the kernel did not check the size of certain iSCSI-related data structures when presenting them in sysfs. A local unprivileged attacker could exploit this (by sending a specially crafted netlink message) to cause a denial of service (system crash) or possibly execute arbitrary code.
    https://bugzilla.redhat.com/show_bug.cgi?id=1930078
  • CVE-2021-27363

    Unrestricted access to sessions and handles in the iSCSI subsystem.

    It was discovered that the kernel did not properly restrict access to iSCSI sessions and transport handles. A local unprivileged attacker could use this to end arbitrary iSCSI sessions (potentially causing a denial of service) or to expose locations of certain kernel structures.
    https://bugzilla.redhat.com/show_bug.cgi?id=1930079
  • CVE-2021-27364

    Out-of-bounds read in the iSCSI subsystem.

    It was discovered that a local unprivileged attacker could use specially crafted netlink messages to trigger an out-of-bounds read in 'scsi_transport_iscsi' module. The kernel could crash as a result.
    https://bugzilla.redhat.com/show_bug.cgi?id=1930080
  • PSBM-122965

    ip_set: null pointer dereference in ip_set_utest().

    It was discovered that an attacker could trigger a kernel crash (null pointer dereference) in ip_set_utest() by running a specially crafted sequence of system calls in a container.
  • PSBM-123063

    ip_set: kernel crash in ip_set_comment_free().

    It was discovered that an attacker could trigger a kernel crash (general protection fault) in ip_set_comment_free() by running a specially crafted sequence of system calls in a container.
  • PSBM-123084

    xfrm subsystem of the Linux kernel could accept user-defined templates with invalid protocol numbers, which caused warnings in xfrm_state_fini().

  • CVE-2021-3178

    If a subdirectory of a file system was exported via NFS, an attacker could use READDIRPLUS operation to access other parts of that file system.

    https://access.redhat.com/security/cve/cve-2021-3178
  • PSBM-126136

    Virtual machines could not start in certain cases due to incorrect detection of CPU feature 'IBPB'.

  • PSBM-122990

    'Bad unlock balance' error in ipmr_mfc_seq_stop().

    It was discovered that the implementation of IPv6 multicast routing could try to access wrong data when a user tried to read certain files in /proc. An attacker could exploit that from a container to trigger 'bad unlock balance' error in ipmr_mfc_seq_stop(), followed by a kernel crash.
  • PSBM-122991

    Soft lockup in ext4_ext_find_extent().

    It was discovered that certain ioctl operations in ext4 did not check their arguments properly. An attacker could exploit that from a container to trigger soft lockups in ext4_ext_find_extent() function, which could result in a denial of service.
  • CVE-2020-29661

    Incorrect locking in TTY subsystem could lead to use-after-free conditions and cause memory corruption.

    https://access.redhat.com/security/cve/cve-2020-29661
  • PSBM-123043

    A specially crafted program running in a container could make certain processes on the host hang (denial of service).

  • PSBM-122653

    Kernel crash in mem_cgroup_from_cont() due to a race between memory reclaim and offlining of a cgroup.

  • PSBM-122035

    ploop: certain operations with large ploop images could lead to a division by zero in __map_extent_bmap().

  • PSBM-121833

    nfsd: Potential kernel crash in nfs4_put_stid().

  • PSBM-121772

    'ploop grow' operation could fail in certain cases if the ploop image file contained holes.

  • PSBM-121523

    Processes being killed by the OOM killer could continue consuming memory.

    If a process running in a container performed large allocations of kernel memory, this could hit the memory limit for the container and trigger the OOM killer. It was discovered, however, that the process being killed by it could continue consuming memory for some time. This could lead to out of memory conditions on the host.
  • PSBM-106785

    bcache: Potential kernel crash when using RAID1 as a backing device.

  • PSBM-108276

    ploop: Potential kernel crash or data corruption during backups due to racy operations with lockout data.

  • PSBM-108091

    netfilter/ipset: excessive memory consumption leading to a denial of service.

    If was discovered that not all memory allocated for ipset-related data was properly accounted for. An attacker could exploit it from a container to consume lots of kernel memory, making the host system unusable (denial of service).
  • CVE-2020-25212

    NFS v4: potential memory corruption on the client system when processing security attributes.

    It was discovered that a buffer overflow and memory corruption were possible if a system tried to mount an NFS v4 share where the files had security labels in the file attributes. An attacker would need to control the NFS server and make it send a specific series of responses to trigger the issue. The issue allows the attacker to crash the kernel on the client system or, potentially, escalate their privileges there.
    https://access.redhat.com/security/cve/CVE-2020-25212
  • CVE-2020-25211

    netfilter: kernel crash due to a buffer overflow in ctnetlink_parse_tuple_filter().

    It was discovered that a local attacker could pass a specially crafted configuration of conntrack to the kernel to cause a buffer overflow in ctnetlink_parse_tuple_filter() function. As a result, the kernel could crash.
    https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-25211
  • PSBM-107061

    Potential kernel crash (use-after-free) in the implementation of usermode helpers.

    A race condition was discovered in the implementation of usermode helpers in the kernel. An attacker could exploit it from a container to cause a denial-of-service (kernel crash due to a use-after-free), or, potentially, to escalate their privileges in the system.
  • PSBM-106408

    nf_tables: kernel crash in nf_tables_getset().

    It was discovered that the implementation of nf_tables did not properly validate certain parameters. An attacker could exploit this from a container to cause a kernel crash: NULL pointer dereference or a general protection fault in nf_tables_getset().
  • PSBM-106395

    nfnetlink: potential kernel crash (skb_over_panic) in skb_put().

    It was discovered that nfnetlink subsystem did not properly validate certain messages. An attacker could exploit this from a container to cause a kernel crash: skb_over_panic in skb_put().
  • PSBM-106273

    nf_conntrack: potential kernel crash in nf_ct_gre_keymap_destroy().

    https://bugs.openvz.org/browse/OVZ-7224
  • PSBM-105850

    File system of a container becomes read-only, __ext4_handle_dirty_metadata() reports error 28.

    https://forum.openvz.org/index.php?t=msg&th=13635
  • CVE-2020-0305

    Possible use-after-free error due to a race condition in cdev_get().

    It was discovered that use-after-free condition was possible in cdev_get() if multiple processes simultaneously accessed a character device in a certain way. A local attacker could potentially exploit this to crash the kernel.
    https://access.redhat.com/security/cve/cve-2020-0305
  • PSBM-98148

    memcg: kernel crash in memcg_destroy_kmem_caches() caused by unbalanced css_tryget/css_put operations.

  • CVE-2019-20812

    af_packet: potential soft lockup in case of certain errors when using TPACKET_V3.

    It was found that if TPACKET_V3 was used and the kernel failed to obtain certain settings from a relevant network device, the retirement timer could be set incorrectly in the implementation AF_PACKET protocol. This could result in soft lockups and excessive CPU usage.
    https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-20812
  • CVE-2020-10711

    netlabel: kernel crash (null pointer dereference) while processing a specially crafted CIPSO packet.

    A NULL pointer dereference was found in the implementation of SELinux. The issue occurs while importing the Commercial IP Security Option (CIPSO) protocol category bitmap into SELinux extensible bitmap. Parsing of a specially crafted CIPSO packet sent by a remote attacker could lead to a kernel crash (remote DoS).
    https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10711
  • CVE-2020-10732

    Core dumps of some processes could contain uninitialized kernel data.

    It was discovered that core dumps of userspace processes could contain copies of uninitialized kernel memory areas in certain cases. Although it is difficult for an attacker to control what data is in these areas, this issue, in theory, could be used to obtain sensitive information from the kernel.
    https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10732
  • CVE-2020-10769

    crypto/authenc: kernel crash in crypto_ahash_setkey() when payload of a key is longer than 4 bytes and is not aligned.

    An out-of-bounds read was found in the implementation of IPsec cryptographic algorithms ('authenc' module). When payload of a key was longer than 4 bytes but was not properly aligned, crypto_authenc_extractkeys() function could try to read data from a wrong location. This could lead to a kernel crash in crypto_ahash_setkey().
    https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10769
  • PSBM-104867

    ploop: kernel crash (division by zero) in purge_lru_warn().

  • CVE-2020-12114

    Denial of service by corrupting mountpoint reference counter.

    It was discovered that a race condition was possible between pivot_root() and put_mountpoint() operations. A local unprivileged attacker could exploit this to corrupt mountpoint reference counter and cause a denial of service (kernel crash).
    https://bugzilla.redhat.com/show_bug.cgi?id=1848652
  • PSBM-104563

    ext4: potential kernel crash in ext4_cross_rename(): certain error cases were not checked properly.

  • PSBM-104517

    ext4: use-after-free when unmounting a corrupted file system with files that have no links.

    https://bugzilla.kernel.org/show_bug.cgi?id=205433
  • PSBM-104664

    futex: potential system hang due to a missing unlock operation in the error path of futex_wait_requeue_pi().

  • PSBM-104530

    cbt: potential endless loops in the error paths.

  • CVE-2020-14305

    netfilter: potential memory corruption caused by a helper from nf_conntrack_h323 module.

    https://bugs.openvz.org/browse/OVZ-7188
  • PSBM-104387

    nf_conntrack: potential kernel crash in netlink_has_listeners().

  • PSBM-104342

    ext4: attempts to freeze the FS could hang in certain cases due to an unbalanced internal write counter.

  • PSBM-104086

    netlink: performance issues due to direct memory reclaim in netlink_dump() and netlink_trim().

  • PSBM-103975

    memcg: kernel could crash when memory was uncharged from a cgroup while the cgroup was going offline.

    It was found that a race was possible between uncharging memory from a cgroup and making that cgroup offline. This could lead to premature destruction of the cgroup and could cause a kernel crash.
  • PSBM-104125

    packet: packet_sk_charge() could try to charge zero memory, leading to a use-after-free in memcg subsystem.

  • PSBM-103864

    memcg: potential use-after-free in the implementation of uncharge operations.

  • PSBM-102320

    qxl: kernel crash in qxl_release_fence_buffer_objects().

  • CVE-2020-10720

    Use-after-free read in napi_gro_frags().

    A flaw was found in the implementation of GRO, which allows an attacker with local access to trigger a use-after-free read in napi_gro_frags() and, potentially, crash the system.
    https://bugzilla.redhat.com/show_bug.cgi?id=1781204
  • VSTOR-33397

    i40iw: kernel complains about failed RTNL assertion in i40iw_addr_resolve_neigh().

  • PSBM-103518

    Slow memory allocations in nf_conntrack when a netns is created.

    When a new netns is created, high-order page allocations can happen in nf_ct_alloc_hashtable(). If memory is fragmented, such allocations can become very slow due to memory reclaim, etc. This, in turn, could result in significant slowdowns on the node.
  • PSBM-102407

    nfsd: memory corruption in nfsd4_lock().

  • PSBM-102848

    (enhancement) ploop: added interface to dump the cached BAT.

    It was discovered that containers could get a broken on-disk BAT but have healthy in-kernel data in certain cases. To detect and fix such conditions, the means to dump the cached BAT were implemented in ploop. Note that, to make use of this enhancement, version 7.0.187.4 or newer of the userspace ploop tools is needed.
  • PSBM-102655

    netfilter: kernel crash in the implementation of nf_tables due to use-after-free in dynamic operations.

  • PSBM-102363

    A container with NFS server could force other such containers to use the older NFSv4 client tracker, which slows down NFS mounts.

  • VSTOR-32221

    mpt2sas: scheduling while atomic in _scsih_io_done().

  • PSBM-101823

    ploop: potential corruption of the index during discard operation.

    A race condition was discovered in ploop, which could lead to corruption of the index during discard operations in certain cases. Note. It is not recommended to manually unload the ReadyKernel patch with the fix for this issue while any discard operations for ploop images are in progress: the ploop images could be corrupted as a result. Upgrading the patch is OK, only manual unloads and downgrades can be problematic.
  • PSBM-102070

    ploop: warn if a discard request is issued for the ploop header.

  • PSBM-102033

    ve: detect removal of additional system libraries in the containers to simplify debugging.

  • PSBM-101783

    Potential leak of a reference counter for a memory cgroup in memcg_expand_shrinker_maps().

  • PSBM-101533

    Potential corruption of ploop images due to a race between the truncation thread and resize operations.

  • PSBM-101595

    ve: make it easier to analyze removal of system libraries in the containers.

  • CVE-2019-15538

    xfs: potential denial of service caused by missing unlock operation in xfs_setattr_nonsize().

    It was discovered that xfs_setattr_nonsize() would not unlock 'ILOCK' lock if the user or group were out of their disk quota. As a result, any subsequent operation, which needed to take 'ILOCK', would get stuck, leading to a denial of service.
    https://access.redhat.com/security/cve/cve-2019-15538
  • PSBM-101492

    nf_tables: kernel crash in nft_rbtree_lookup().

  • PSBM-101189

    ploop: holes in raw ploop images were handled incorrectly.

  • PSBM-94695

    Kernel crash due to out-of-bounds memory accesses in process_vm_readv().

    It was discovered that the implementation of process_vm_readv() system call could try to access memory outside of the structures it was processing in certain cases. A local unprivileged user could use this vulnerability to crash the system.
  • PSBM-101159

    quotaoff operation executed in a container could get stuck in D state.

  • PSBM-101143

    Certain operations with an empty ploop image could lead to its unexpected growth.

  • PSBM-101249

    Incomplete fix for PSBM-100575: reading of /proc/bc/resources line by line would never end.

  • PSBM-100509

    memcg: memory corruption caused by writing beyond the end of shrinker_map structure.

  • PSBM-100722

    ixgbe: lots of warnings in the system log due to incorrect check for firmware errors.

  • PSBM-100739

    ploop: kernel crashes when processing discard requests for ploop images in raw format.

  • PSBM-100118

    scsi: printing lots of messages about rejected I/O causes a hard lockup and a kernel crash.

  • PSBM-100593

    Kernel crash in shrink_slab() when trying to mount an image with a broken ext4 file system.

  • PSBM-100575

    Reading of /proc/bc/resources line by line would never end: no end of file was reported.

  • PSBM-100579

    Potential kernel crash in __radix_tree_insert() when fscache is used for NFS mounts.

  • PSBM-99764

    sunrpc: potential kernel crash in bc_svc_process().

  • PSBM-100441

    A bug in ploop prevented recovery of corrupted ploop images.

  • VSTOR-29472

    The minimum amount of reserved free memory (vm.min_free_kbytes) was set too high by default.

  • PSBM-96262

    kvm: potential system hang due to an error in mmu_shrink_scan().

  • PSBM-96057

    Processes could get stuck in copy_net_ns() forever.