readykernel-patch-151.14-115.0-1.vl7

Kernel Update Version:
3.10.0-1127.8.2.vz7.151.14
Release Date:
2020-09-07 17:03:01
  • 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-2020-10732

    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
  • 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-104664

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