Synopsis
Important: kernel-alt security, bug fix, and enhancement update
Type/Severity
Security Advisory: Important
Topic
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.
Description
The kernel-alt packages provide the Linux kernel version 4.x.
Security Fix(es):
- Kernel: KVM: OOB memory access via mmio ring buffer (CVE-2019-14821)
- kernel: Race condition in drivers/md/dm.c:dm_get_from_kobject() allows local users to cause a denial of service (CVE-2017-18203)
- kernel: use-after-free Read in vhost_transport_send_pkt (CVE-2018-14625)
- kernel: Information leak in cdrom_ioctl_drive_status (CVE-2018-16658)
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):
- IPMI use after free issue seen on Marvell ThunderX2 (BZ#1732163)
- kernel: siginfo delivers SEGV_MAPERR instead of SEGV_ACCERR [rhel-alt-7.6.z] (BZ#1757189)
Enhancement(s):
- [Marvell 7.7 z-stream BUG] CN99xx: DIMM label not extracted in EDAC hw error log (BZ#1721427)
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 ARM 64 7 aarch64
-
Red Hat Enterprise Linux for Power 9 7 ppc64le
-
Red Hat Enterprise Linux for IBM System z (Structure A) 7 s390x
Fixes
- BZ - 1550811 - CVE-2017-18203 kernel: Race condition in drivers/md/dm.c:dm_get_from_kobject() allows local users to cause a denial of service
- BZ - 1619846 - CVE-2018-14625 kernel: use-after-free Read in vhost_transport_send_pkt
- BZ - 1627731 - CVE-2018-16658 kernel: Information leak in cdrom_ioctl_drive_status
- BZ - 1746708 - CVE-2019-14821 Kernel: KVM: OOB memory access via mmio ring buffer
CVEs
References
Vulmon