Topic

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.

Description

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

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: ppc: unrelated processes being able to read/write to each other's virtual memory (CVE-2019-12817)
• kernel: Use-after-free in sound/usb/card.c:usb_audio_probe() (CVE-2018-19824)
• 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):

• [DELL EMC 8.0 BUG]: pciehp deadlock resulting in NVMe device not being recognized when hot plugged (BZ#1712261)
• Host crashed while try to boot a compatible guest attached huge page by"-object memory-backend-file *"[1G-P9] (BZ#1714758)
• Setting malformed authenc key will crash the system (BZ#1715335)
• BUG: memory allocation failure in inode_doinit_with_dentry()/context_to_sid() (BZ#1717780)
• [HPEMC 8.1 BUG] Protect against concurrent calls into UV BIOS (BZ#1724534)
• PHC jumping on I350 (igb) (BZ#1726352)
• aarch64 kernel missing vulnerabilities status files (BZ#1726353)
• BUG: KASAN: use-after-free in skb_release_data() (BZ#1726354)
• [RHEL8][PANIC][aarch64] kernel panic when loading the dme1737 module (BZ#1726355)
• [RHEL8] [aarch64] Changes for BZ1672997 break kaslr (BZ#1726357)
• Network fails to come up when booting with kernel 3.10.0-862.el7.x86_64, several hung tasks can be seen in logs. (BZ#1726358)
• [Intel] 'cpupower frequency-set' produces unexpected results for some processors (BZ#1726360)
• HDMI/DP audio: ELD not updated on hotplug event (BZ#1726361)
• [mlx5_core] CX5 Adapter works not as expected when MTU is 9000, Unable to handle kernel paging request at virtual address 3ae0aafeff4b6b5a (BZ#1726372)
• [DELL 8.0 Bug] - hid-multitouch 0018:1FD2:8008.0001 ,lost function from S3 resume (BZ#1727098)
• [RHEL8.1 Pre Beta] [Power8] data corruption while returning from watchpoint exception handler (BZ#1733281)
• RHEL8.1 pre-Beta - cacheinfo code unsafe vs LPM (BZ#1733282)
• RHEL8.1 pre-Beta - [ZZ/Zeppelin] [kernel-4.18.0-100.el8.ppc64le] Hash MMU allows child to write parents process address space (BZ#1734689)

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 x86_64 8 x86_64
• Red Hat Enterprise Linux for IBM z Systems 8 s390x
• Red Hat Enterprise Linux for Power, little endian 8 ppc64le
• Red Hat Enterprise Linux for ARM 64 8 aarch64
• Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 8.0 ppc64le
• Red Hat Enterprise Linux Server - Update Services for SAP Solutions 8.0 x86_64
• Red Hat CodeReady Linux Builder for x86_64 8 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian 8 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 8 aarch64

Fixes

• BZ - 1655816 - CVE-2018-19824 kernel: Use-after-free in sound/usb/card.c:usb_audio_probe()
• 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 - 1720616 - CVE-2019-12817 kernel: ppc: unrelated processes being able to read/write to each other's virtual memory

CVEs

• CVE-2018-19824
• CVE-2019-3846
• CVE-2019-3887
• CVE-2019-9500
• CVE-2019-9503
• CVE-2019-11487
• CVE-2019-12817

References