10 - RHSA-2019:1959

Problem Description:

An update for kernel is now available for Red Hat Enterprise Linux 8.

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 CodeReady Linux Builder (v. 8) - aarch64, ppc64le, x86_64 Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, noarch, ppc64le, s390x, x86_64

3. Description:

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

Security Fix(es):

* kernel: insufficient input validation in kernel mode driver in Intel i915 graphics leads to privilege escalation (CVE-2019-11085)

* kernel: DMA attack using peripheral devices (Thunderclap) (BZ#1690716)

* kernel: infinite loop in update_blocked_averages() in kernel/sched/fair.c leading to denial of service (CVE-2018-20784)

* kernel: a NULL pointer dereference in drivers/scsi/megaraid/megaraid_sas_base.c leading to DoS (CVE-2019-11810)

* kernel: use-after-free in drivers/char/ipmi/ipmi_si_intf.c, ipmi_si_mem_io.c, ipmi_si_port_io.c (CVE-2019-11811)

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):

* [DELL 8.0 z-stream BUG] - "CPU unsupported" message with CFL-H/S 8+2 due to updated Stepping (BZ#1711048)

* RHEL8.0 Snapshot4 - [LTC Test] Guest crashes during vfio device hot-plug/un-plug operations. (kvm) (BZ#1714746)

* Using Transactional Memory (TM) in a Guest Locks-up Host Core on a Power9 System (BZ#1714751)

* VRSAVE register not properly saved and restored (BZ#1714753)

* Fix potential spectre gadget in arch/s390/kvm/interrupt.c (BZ#1714754)

* RHEL8.0 RC2 - kernel/KVM - count cache flush Spectre v2 mitigation (required for POWER9 DD2.3) (BZ#1715018)

* iommu/amd: Set exclusion range correctly (BZ#1715336)

* RHEL8.0 - sched/fair: Do not re-read ->h_load_next during hierarchical load calculation (BZ#1715337)

* cross compile builds are broken (BZ#1715339)

* Patch generated by 'make rh-test-patch' doesn't get applied during build (BZ#1715340)

* hard lockup panic in during execution of CFS bandwidth period timer (BZ#1715345)

* perf annotate -P does not give full paths (BZ#1716887)

* [Dell EMC 8.0 BUG] File system corrupting with I/O Stress on H330 PERC on AMD Systems if IOMMU passthrough is disabled (BZ#1717344)

* Fix Spectre v1 gadgets in drivers/gpu/drm/drm_bufs.c and drivers/gpu/drm/drm_ioctl.c (BZ#1717382)

* BUG: SELinux doesn't handle NFS crossmnt well (BZ#1717777)

* krb5{,i,p} doesn't work with older enctypes on aarch64 (BZ#1717800)

* [RHEL-8.0][s390x]ltp-lite mtest06 testing hits EWD due to: rcu: INFO: rcu_sched self-detected stall on CPU (BZ#1717801)

* RHEL 8 Snapshot-6: CN1200E SW iSCSI I/O performance degradation after a SCSI device/target reset rhel-8.0.0.z] (BZ#1717804)

* dm cache metadata: Fix loading discard bitset (BZ#1717868)

* jit'd java code on power9 ppc64le experiences stack corruption (BZ#1717869)

* BUG: connect(AF_UNSPEC, ...) on a connected socket returns an error (BZ#1717870)

* mm: BUG: unable to handle kernel paging request at 0000000057ac6e9d (BZ#1718237)

* [HPE 8.0 BUG] DCPMM fsdax boot initialization takes a long time causing auto-mount to fail (BZ#1719635)

* AMD Rome: WARNING: CPU: 1 PID: 0 at arch/x86/kernel/cpu/mcheck/mce.c:1510 mcheck_cpu_init+0x7a/0x460 (BZ#1721233)

* [RHEL8.1] AMD Rome: EDAC amd64: Error: F0 not found, device 0x1460 (broken BIOS?) (BZ#1722365)

* AMD Rome: Intermittent NMI received for unknown reason (BZ#1722367)

* [DELL 8.0 BUG] - "CPU unsupported" message with WHL-U due to updated Stepping (BZ#1722372)

Enhancement(s):

* RHEL 8 - AMD Rome Support (BZ#1721972)

Users of kernel are advised to upgrade to these updated packages, which fix these bugs and add this enhancement.

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/):

1680540 - CVE-2018-20784 kernel: infinite loop in update_blocked_averages() in kernel/sched/fair.c leading to denial of service 1690716 - kernel: DMA attack using peripheral devices (Thunderclap) 1709164 - CVE-2019-11810 kernel: a NULL pointer dereference in drivers/scsi/megaraid/megaraid_sas_base.c leading to DoS 1709180 - CVE-2019-11811 kernel: use-after-free in drivers/char/ipmi/ipmi_si_intf.c, ipmi_si_mem_io.c, ipmi_si_port_io.c 1710405 - CVE-2019-11085 kernel: insufficient input validation in kernel mode driver in Intel i915 graphics leads to privilege escalation