RedHat: RHSA-2020-3016:01 Important: kernel-rt security and bug fix update
Summary
The kernel-rt packages provide the Real Time Linux Kernel, which enables
fine-tuning for systems with extremely high determinism requirements.
Security Fix(es):
* kernel: use-after-free in sound/core/timer.c (CVE-2019-19807)
* kernel: kernel: DAX hugepages not considered during mremap
(CVE-2020-10757)
* kernel: Rogue cross-process SSBD shutdown. Linux scheduler logical bug
allows an attacker to turn off the SSBD protection. (CVE-2020-10766)
* kernel: Indirect Branch Prediction Barrier is force-disabled when STIBP
is unavailable or enhanced IBRS is available. (CVE-2020-10767)
* kernel: Indirect branch speculation can be enabled after it was
force-disabled by the PR_SPEC_FORCE_DISABLE prctl command. (CVE-2020-10768)
* kernel: buffer overflow in mwifiex_cmd_append_vsie_tlv function in
drivers/net/wireless/marvell/mwifiex/scan.c (CVE-2020-12653)
* kernel: heap-based buffer overflow in mwifiex_ret_wmm_get_status function
in drivers/net/wireless/marvell/mwifiex/wmm.c (CVE-2020-12654)
* Kernel: vfio: access to disabled MMIO space of some devices may lead to
DoS scenario (CVE-2020-12888)
* kernel: kvm: Information leak within a KVM guest (CVE-2019-3016)
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):
* kernel-rt: update RT source tree to the RHEL-8.2.z2 source tree
(BZ#1829582)
Summary
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.
References
https://access.redhat.com/security/cve/CVE-2019-3016 https://access.redhat.com/security/cve/CVE-2019-19807 https://access.redhat.com/security/cve/CVE-2020-10757 https://access.redhat.com/security/cve/CVE-2020-10766 https://access.redhat.com/security/cve/CVE-2020-10767 https://access.redhat.com/security/cve/CVE-2020-10768 https://access.redhat.com/security/cve/CVE-2020-12653 https://access.redhat.com/security/cve/CVE-2020-12654 https://access.redhat.com/security/cve/CVE-2020-12888 https://access.redhat.com/security/updates/classification/#important
Package List
Red Hat Enterprise Linux Real Time for NFV (v. 8):
Source:
kernel-rt-4.18.0-193.13.2.rt13.65.el8_2.src.rpm
x86_64:
kernel-rt-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-core-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-core-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-debuginfo-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-devel-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-kvm-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-modules-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-modules-extra-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debuginfo-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-devel-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-kvm-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-modules-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-modules-extra-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
Red Hat Enterprise Linux Real Time (v. 8):
Source:
kernel-rt-4.18.0-193.13.2.rt13.65.el8_2.src.rpm
x86_64:
kernel-rt-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-core-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-core-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-debuginfo-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-devel-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-modules-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-modules-extra-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debuginfo-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-devel-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-modules-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-modules-extra-4.18.0-193.13.2.rt13.65.el8_2.x86_64.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/
Topic
An update for kernel-rt is now available for Red Hat Enterprise Linux 8.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux Real Time (v. 8) - x86_64
Red Hat Enterprise Linux Real Time for NFV (v. 8) - x86_64
Bugs Fixed
1786078 - CVE-2019-19807 kernel: use-after-free in sound/core/timer.c
1792167 - CVE-2019-3016 kernel: kvm: Information leak within a KVM guest
1831868 - CVE-2020-12653 kernel: buffer overflow in mwifiex_cmd_append_vsie_tlv function in drivers/net/wireless/marvell/mwifiex/scan.c
1832530 - CVE-2020-12654 kernel: heap-based buffer overflow in mwifiex_ret_wmm_get_status function in drivers/net/wireless/marvell/mwifiex/wmm.c
1836244 - CVE-2020-12888 Kernel: vfio: access to disabled MMIO space of some devices may lead to DoS scenario
1842525 - CVE-2020-10757 kernel: kernel: DAX hugepages not considered during mremap
1845840 - CVE-2020-10766 kernel: Rogue cross-process SSBD shutdown. Linux scheduler logical bug allows an attacker to turn off the SSBD protection.
1845867 - CVE-2020-10767 kernel: Indirect Branch Prediction Barrier is force-disabled when STIBP is unavailable or enhanced IBRS is available.
1845868 - CVE-2020-10768 kernel: Indirect branch speculation can be enabled after it was force-disabled by the PR_SPEC_FORCE_DISABLE prctl command.