4.6 - RHSA-2019:0717

Problem Description:

An update for kernel is now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 6) - i386, noarch, x86_64 Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64 Red Hat Enterprise Linux HPC Node (v. 6) - noarch, x86_64 Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64 Red Hat Enterprise Linux Server (v. 6) - i386, noarch, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Workstation (v. 6) - i386, noarch, x86_64 Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

3. Description:

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

* kernel: Missing check in fs/inode.c:inode_init_owner() does not clear SGID bit on non-directories for non-members (CVE-2018-13405)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

* sched/sysctl: Check user input value of sysctl_sched_time_avg (BZ#1579128)

* unable to handle kernel NULL pointer dereference at 000000000000005d in tcp_enter_frto+0x102 (BZ#1585892)

* qla2xxx: Mask Off Scope bits for Retry delay timer in the driver (BZ#1588133)

* [PATCH] perf: Fix a race between ring_buffer_detach() and ring_buffer_wakeup() (BZ#1589340)

* RHEL6.10 - kernel: improve spectre mitigation for s390x (BZ#1625381)

* kernel panic due to NULL pointer dereference in __wake_up_common through perf_event_wakeup (BZ#1627672)

* After upgrading from rhel 6.9 to rhel 6.10, files in a cifs share can't be read (BZ#1636484)

* Retpoline impact on vdso gettimeofday performance (BZ#1638552)

* [RHEL 6.10] 32-bit kernel-2.6.32-754.3.5 registers the swap of 4k size only (BZ#1670328)

4. Solution:

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

5. Bugs fixed (https://bugzilla.redhat.com/):

1599161 - CVE-2018-13405 kernel: Missing check in fs/inode.c:inode_init_owner() does not clear SGID bit on non-directories for non-members