Synopsis
Important: kernel-rt security and bug fix update
Type/Severity
Security Advisory: Important
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 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.
Description
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: Heap overflow in mwifiex_update_bss_desc_with_ie function in marvell/mwifiex/scan.c (CVE-2019-3846)
- Kernel: KVM: nVMX: guest accesses L0 MSR causes potential DoS (CVE-2019-3887)
- kernel: brcmfmac heap buffer overflow in brcmf_wowl_nd_results (CVE-2019-9500)
- kernel: Count overflow in FUSE request leading to use-after-free issues. (CVE-2019-11487)
- kernel: brcmfmac frame validation bypass (CVE-2019-9503)
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):
- BUG: scheduling while atomic in zswap (BZ#1726362)
- kernel-rt: update to the RHEL8.0.z batch#3 source tree (BZ#1734475)
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.
Affected Products
-
Red Hat Enterprise Linux for Real Time 8 x86_64
-
Red Hat Enterprise Linux for Real Time for NFV 8 x86_64
Fixes
- BZ - 1695044 - CVE-2019-3887 Kernel: KVM: nVMX: guest accesses L0 MSR causes potential DoS
- BZ - 1701224 - CVE-2019-9500 kernel: brcmfmac heap buffer overflow in brcmf_wowl_nd_results
- BZ - 1701842 - CVE-2019-9503 kernel: brcmfmac frame validation bypass
- BZ - 1703063 - CVE-2019-11487 kernel: Count overflow in FUSE request leading to use-after-free issues.
- BZ - 1713059 - CVE-2019-3846 kernel: Heap overflow in mwifiex_update_bss_desc_with_ie function in marvell/mwifiex/scan.c
- BZ - 1726362 - BUG: scheduling while atomic in zswap [rhel-8.0.0.z]
- BZ - 1734475 - kernel-rt: update to the RHEL8.0.z batch#3 source tree
CVEs
References
Vulmon