RHSA-2020:3041 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions.

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: 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)

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):

• [ESXi][RHEL8.1.0] scsi driver SG list incompatibility (vmw_pvscsi) (BZ#1839359)

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 Server for Power LE - Update Services for SAP Solutions 8.0 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.0 x86_64

Fixes

• BZ - 1831868 - CVE-2020-12653 kernel: buffer overflow in mwifiex_cmd_append_vsie_tlv function in drivers/net/wireless/marvell/mwifiex/scan.c
• BZ - 1832530 - CVE-2020-12654 kernel: heap-based buffer overflow in mwifiex_ret_wmm_get_status function in drivers/net/wireless/marvell/mwifiex/wmm.c
• BZ - 1836244 - CVE-2020-12888 Kernel: vfio: access to disabled MMIO space of some devices may lead to DoS scenario
• BZ - 1842525 - CVE-2020-10757 kernel: kernel: DAX hugepages not considered during mremap
• BZ - 1845840 - CVE-2020-10766 kernel: Rogue cross-process SSBD shutdown. Linux scheduler logical bug allows an attacker to turn off the SSBD protection.
• BZ - 1845867 - CVE-2020-10767 kernel: Indirect Branch Prediction Barrier is force-disabled when STIBP is unavailable or enhanced IBRS is available.
• BZ - 1845868 - CVE-2020-10768 kernel: Indirect branch speculation can be enabled after it was force-disabled by the PR_SPEC_FORCE_DISABLE prctl command.

CVEs

• CVE-2020-10757
• CVE-2020-10766
• CVE-2020-10767
• CVE-2020-10768
• CVE-2020-12653
• CVE-2020-12654
• CVE-2020-12888

References

• https://access.redhat.com/security/updates/classification/#important