RHSA-2020:2851 — Security Advisory

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.

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

Security Fix(es):

• kernel: Count overflow in FUSE request leading to use-after-free issues. (CVE-2019-11487)

• Kernel: KVM: OOB memory access via mmio ring buffer (CVE-2019-14821)

• Kernel: vfio: access to disabled MMIO space of some devices may lead to DoS scenario (CVE-2020-12888)

• kernel: denial of service via ioctl call in network tun handling (CVE-2018-7191)

• kernel: usb: missing size check in the __usb_get_extra_descriptor() leading to DoS (CVE-2018-20169)

• kernel: perf_event_open() and execve() race in setuid programs allows a data leak (CVE-2019-3901)

• kernel: use-after-free in arch/x86/lib/insn-eval.c (CVE-2019-13233)

• kernel: memory leak in register_queue_kobjects() in net/core/net-sysfs.c leads to denial of service (CVE-2019-15916)

• kernel: powerpc: incomplete Spectre-RSB mitigation leads to information exposure (CVE-2019-18660)

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):

• kernel: hw: provide reporting and microcode mitigation toggle for CVE-2020-0543 / Special Register Buffer Data Sampling (SRBDS) (BZ#1840677)