readykernel-patch-131.10-123.0-1.vl7

Kernel Update Version:
3.10.0-1062.12.1.vz7.131.10
Release Date:
2021-03-01 11:10:02
  • 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-99181

    Memory reclaim could become too slow leading to high LA on the nodes.

    The original fix for PSBM-99181 and related issues introduced a problem: management of shrinkers used to reclaim memory could become very inefficient in certain cases, causing higher load on the affected nodes.
  • PSBM-106273

    nf_conntrack: potential kernel crash in nf_ct_gre_keymap_destroy().

    https://bugs.openvz.org/browse/OVZ-7224
  • PSBM-106384

    memcg: the limit on page cache (memory.cache.limit_in_bytes) could be exceeded significantly in certain cases.

  • 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.

  • PSBM-105237

    Hard lockup and kernel crash caused by incorrect locking in calc_load_ve().

  • 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().

  • 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-102573

    Potential hard lockups in timer-related code: jiffies_lock could be held for a long time.

  • 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.

  • PSBM-102478

    ext4: potential kernel crash (general protection fault) in ext4_free_blocks().

  • VSTOR-32221

    mpt2sas: scheduling while atomic in _scsih_io_done().