Synopsis

Important: kernel security, bug fix, and enhancement update

Type/Severity

Security Advisory: Important

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.6 Extended Update Support.

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: rtl_p2p_noa_ie in drivers/net/wireless/realtek/rtlwifi/ps.c in the Linux kernel lacks a certain upper-bound check, leading to a buffer overflow (CVE-2019-17666)
• Kernel: KVM: export MSR_IA32_TSX_CTRL to guest - incomplete fix for TAA (CVE-2019-11135) (CVE-2019-19338)

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):

• Slow console output with ast (Aspeed) graphics driver (BZ#1780146)
• VFS: Busy inodes after unmount of loop0 when encountering duplicate directory inodes (BZ#1781158)
• RHEL 7.7 long I/O stalls with bnx2fc from not masking off scope bits of retry delay value (BZ#1795648)
• System Crash on vport creation (NPIV on FCoE) (BZ#1796363)
• A directory on a gfs2 filesystem appears corrupt on nodeB after nodeA renames the directory (BZ#1796430)
• [GSS] Can't access the mount point due to possible blocking of i/o on rbd (BZ#1796434)
• [xfstests]: copy_file_range cause corruption on rhel-7 (BZ#1797966)
• port show-kabi to python3 (BZ#1806928)
• top shows super high loads when tuned profile realtime-virtual-host is applied (BZ#1808028)

Enhancement(s):

• scsi: qla2xxx: Fix panic in qla_dfs_tgt_counters_show' (BZ#1791594)
• [Cavium 7.7 Feat] qla2xxx: Update to latest upstream. (BZ#1797503)

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 - Extended Update Support 7.6 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.6 s390x
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.6 ppc64
• Red Hat Enterprise Linux EUS Compute Node 7.6 x86_64
• Red Hat Enterprise Linux Server - AUS 7.6 x86_64
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.6 ppc64le
• Red Hat Enterprise Linux Server - TUS 7.6 x86_64
• Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 7.6 ppc64le
• Red Hat Enterprise Linux Server - Update Services for SAP Solutions 7.6 x86_64
• Red Hat Virtualization Host - Extended Update Support 4.2 for RHEL 7.6 x86_64

Fixes

• BZ - 1763690 - CVE-2019-17666 kernel: rtl_p2p_noa_ie in drivers/net/wireless/realtek/rtlwifi/ps.c in the Linux kernel lacks a certain upper-bound check, leading to a buffer overflow
• BZ - 1781514 - CVE-2019-19338 Kernel: KVM: export MSR_IA32_TSX_CTRL to guest - incomplete fix for TAA (CVE-2019-11135)

CVEs

• CVE-2019-17666
• CVE-2019-19338

References