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====================================================================                   
Red Hat Security Advisory

Synopsis:          Important: kernel-alt security and bug fix update
Advisory ID:       RHSA-2020:2854-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2020:2854
Issue date:        2020-07-07
CVE Names:         CVE-2018-16884 CVE-2019-9458 CVE-2019-11811
                   CVE-2019-15917 CVE-2019-18808 CVE-2019-19062
                   CVE-2019-19767 CVE-2019-20636 CVE-2020-8834
                   CVE-2020-10720 CVE-2020-11565 CVE-2020-12888
====================================================================
1. Summary:

An update for kernel-alt is now available for Red Hat Enterprise Linux 7.

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 for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, noarch, ppc64le, s390x
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - aarch64, noarch, ppc64le

3. Description:

The kernel-alt packages provide the Linux kernel version 4.x.

Security Fix(es):

* kernel: nfs: use-after-free in svc_process_common() (CVE-2018-16884)

* Kernel: ppc: kvm: conflicting use of HSTATE_HOST_R1 to store r1 state
leads to host stack corruption (CVE-2020-8834)

* Kernel: vfio: access to disabled MMIO space of some devices may lead to
DoS scenario (CVE-2020-12888)

* kernel: use after free due to race condition in the video driver leads to
local privilege escalation (CVE-2019-9458)

* 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)

* kernel: use-after-free in drivers/bluetooth/hci_ldisc.c (CVE-2019-15917)

* kernel: memory leak in ccp_run_sha_cmd() function in
drivers/crypto/ccp/ccp-ops.c (CVE-2019-18808)

* kernel: use-after-free in __ext4_expand_extra_isize and
ext4_xattr_set_entry related to fs/ext4/inode.c and fs/ext4/super.c
(CVE-2019-19767)

* kernel: an out-of-bounds write via crafted keycode table (CVE-2019-20636)

* kernel: use-after-free read in napi_gro_frags() in the Linux kernel
(CVE-2020-10720)

* kernel: out-of-bounds write in mpol_parse_str function in mm/mempolicy.c
(CVE-2020-11565)

* kernel: A memory leak in the crypto_report() function in
crypto/crypto_user_base.c allows for a DoS (CVE-2019-19062)

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):

* XFS: Metadata corruption detected at xfs_attr3_leaf_read_verify
[rhel-alt-7.6.z] (BZ#1830836)

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/):

1660375 - CVE-2018-16884 kernel: nfs: use-after-free in svc_process_common()
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
1760100 - CVE-2019-15917 kernel: use-after-free in drivers/bluetooth/hci_ldisc.c
1775021 - CVE-2019-19062 kernel: A memory leak in the crypto_report() function in crypto/crypto_user_base.c allows for a DoS
1777418 - CVE-2019-18808 kernel: memory leak in ccp_run_sha_cmd() function in drivers/crypto/ccp/ccp-ops.c
1781204 - CVE-2020-10720 kernel: use-after-free read in napi_gro_frags() in the Linux kernel
1786160 - CVE-2019-19767 kernel: use-after-free in __ext4_expand_extra_isize and ext4_xattr_set_entry related to fs/ext4/inode.c and fs/ext4/super.c
1819377 - CVE-2019-9458 kernel: use after free due to race condition in the video driver leads to local privilege escalation
1819615 - CVE-2020-8834 Kernel: ppc: kvm: conflicting use of HSTATE_HOST_R1 to store r1 state leads to host stack corruption
1824059 - CVE-2019-20636 kernel: an out-of-bounds write via crafted keycode table
1824918 - CVE-2020-11565 kernel: out-of-bounds write in mpol_parse_str function in mm/mempolicy.c
1836244 - CVE-2020-12888 Kernel: vfio: access to disabled MMIO space of some devices may lead to DoS scenario

6. Package List:

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7):

Source:
kernel-alt-4.14.0-115.26.1.el7a.src.rpm

aarch64:
kernel-4.14.0-115.26.1.el7a.aarch64.rpm
kernel-debug-4.14.0-115.26.1.el7a.aarch64.rpm
kernel-debug-debuginfo-4.14.0-115.26.1.el7a.aarch64.rpm
kernel-debug-devel-4.14.0-115.26.1.el7a.aarch64.rpm
kernel-debuginfo-4.14.0-115.26.1.el7a.aarch64.rpm
kernel-debuginfo-common-aarch64-4.14.0-115.26.1.el7a.aarch64.rpm
kernel-devel-4.14.0-115.26.1.el7a.aarch64.rpm
kernel-headers-4.14.0-115.26.1.el7a.aarch64.rpm
kernel-tools-4.14.0-115.26.1.el7a.aarch64.rpm
kernel-tools-debuginfo-4.14.0-115.26.1.el7a.aarch64.rpm
kernel-tools-libs-4.14.0-115.26.1.el7a.aarch64.rpm
perf-4.14.0-115.26.1.el7a.aarch64.rpm
perf-debuginfo-4.14.0-115.26.1.el7a.aarch64.rpm
python-perf-4.14.0-115.26.1.el7a.aarch64.rpm
python-perf-debuginfo-4.14.0-115.26.1.el7a.aarch64.rpm

noarch:
kernel-abi-whitelists-4.14.0-115.26.1.el7a.noarch.rpm
kernel-doc-4.14.0-115.26.1.el7a.noarch.rpm

ppc64le:
kernel-4.14.0-115.26.1.el7a.ppc64le.rpm
kernel-bootwrapper-4.14.0-115.26.1.el7a.ppc64le.rpm
kernel-debug-4.14.0-115.26.1.el7a.ppc64le.rpm
kernel-debug-debuginfo-4.14.0-115.26.1.el7a.ppc64le.rpm
kernel-debuginfo-4.14.0-115.26.1.el7a.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.14.0-115.26.1.el7a.ppc64le.rpm
kernel-devel-4.14.0-115.26.1.el7a.ppc64le.rpm
kernel-headers-4.14.0-115.26.1.el7a.ppc64le.rpm
kernel-tools-4.14.0-115.26.1.el7a.ppc64le.rpm
kernel-tools-debuginfo-4.14.0-115.26.1.el7a.ppc64le.rpm
kernel-tools-libs-4.14.0-115.26.1.el7a.ppc64le.rpm
perf-4.14.0-115.26.1.el7a.ppc64le.rpm
perf-debuginfo-4.14.0-115.26.1.el7a.ppc64le.rpm
python-perf-4.14.0-115.26.1.el7a.ppc64le.rpm
python-perf-debuginfo-4.14.0-115.26.1.el7a.ppc64le.rpm

s390x:
kernel-4.14.0-115.26.1.el7a.s390x.rpm
kernel-debug-4.14.0-115.26.1.el7a.s390x.rpm
kernel-debug-debuginfo-4.14.0-115.26.1.el7a.s390x.rpm
kernel-debug-devel-4.14.0-115.26.1.el7a.s390x.rpm
kernel-debuginfo-4.14.0-115.26.1.el7a.s390x.rpm
kernel-debuginfo-common-s390x-4.14.0-115.26.1.el7a.s390x.rpm
kernel-devel-4.14.0-115.26.1.el7a.s390x.rpm
kernel-headers-4.14.0-115.26.1.el7a.s390x.rpm
kernel-kdump-4.14.0-115.26.1.el7a.s390x.rpm
kernel-kdump-debuginfo-4.14.0-115.26.1.el7a.s390x.rpm
kernel-kdump-devel-4.14.0-115.26.1.el7a.s390x.rpm
perf-4.14.0-115.26.1.el7a.s390x.rpm
perf-debuginfo-4.14.0-115.26.1.el7a.s390x.rpm
python-perf-4.14.0-115.26.1.el7a.s390x.rpm
python-perf-debuginfo-4.14.0-115.26.1.el7a.s390x.rpm

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7):

aarch64:
kernel-debug-debuginfo-4.14.0-115.26.1.el7a.aarch64.rpm
kernel-debuginfo-4.14.0-115.26.1.el7a.aarch64.rpm
kernel-debuginfo-common-aarch64-4.14.0-115.26.1.el7a.aarch64.rpm
kernel-tools-debuginfo-4.14.0-115.26.1.el7a.aarch64.rpm
kernel-tools-libs-devel-4.14.0-115.26.1.el7a.aarch64.rpm
perf-debuginfo-4.14.0-115.26.1.el7a.aarch64.rpm
python-perf-debuginfo-4.14.0-115.26.1.el7a.aarch64.rpm

noarch:
kernel-doc-4.14.0-115.26.1.el7a.noarch.rpm

ppc64le:
kernel-debug-debuginfo-4.14.0-115.26.1.el7a.ppc64le.rpm
kernel-debug-devel-4.14.0-115.26.1.el7a.ppc64le.rpm
kernel-debuginfo-4.14.0-115.26.1.el7a.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.14.0-115.26.1.el7a.ppc64le.rpm
kernel-tools-debuginfo-4.14.0-115.26.1.el7a.ppc64le.rpm
kernel-tools-libs-devel-4.14.0-115.26.1.el7a.ppc64le.rpm
perf-debuginfo-4.14.0-115.26.1.el7a.ppc64le.rpm
python-perf-debuginfo-4.14.0-115.26.1.el7a.ppc64le.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2018-16884
https://access.redhat.com/security/cve/CVE-2019-9458
https://access.redhat.com/security/cve/CVE-2019-11811
https://access.redhat.com/security/cve/CVE-2019-15917
https://access.redhat.com/security/cve/CVE-2019-18808
https://access.redhat.com/security/cve/CVE-2019-19062
https://access.redhat.com/security/cve/CVE-2019-19767
https://access.redhat.com/security/cve/CVE-2019-20636
https://access.redhat.com/security/cve/CVE-2020-8834
https://access.redhat.com/security/cve/CVE-2020-10720
https://access.redhat.com/security/cve/CVE-2020-11565
https://access.redhat.com/security/cve/CVE-2020-12888
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2020 Red Hat, Inc.
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