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Important: kernel

Description

**Issue Overview:** An out-of-bounds access issue was found in the way Linux kernel's KVM hypervisor implements the Coalesced MMIO write operation. It operates on an MMIO ring buffer 'struct kvm_coalesced_mmio' object, wherein write indices 'ring->first' and 'ring->last' value could be supplied by a host user-space process. An unprivileged host user or process with access to '/dev/kvm' device could use this flaw to crash the host kernel, resulting in a denial of service or potentially escalating privileges on the system. (CVE-2019-14821) A buffer overflow flaw was found in the way Linux kernel's vhost functionality that translates virtqueue buffers to IOVs, logged the buffer descriptors during migration. A privileged guest user able to pass descriptors with invalid length to the host when migration is underway, could use this flaw to increase their privileges on the host.(CVE-2019-14835) **Affected Packages:** kernel **Issue Correction:** Run _yum update kernel_ to update your system. **New Packages:** i686:     kernel-debuginfo-4.14.146-93.123.amzn1.i686     kernel-4.14.146-93.123.amzn1.i686     kernel-tools-devel-4.14.146-93.123.amzn1.i686     kernel-headers-4.14.146-93.123.amzn1.i686     kernel-debuginfo-common-i686-4.14.146-93.123.amzn1.i686     perf-debuginfo-4.14.146-93.123.amzn1.i686     kernel-devel-4.14.146-93.123.amzn1.i686     perf-4.14.146-93.123.amzn1.i686     kernel-tools-4.14.146-93.123.amzn1.i686     kernel-tools-debuginfo-4.14.146-93.123.amzn1.i686 src:     kernel-4.14.146-93.123.amzn1.src x86_64:     kernel-debuginfo-common-x86_64-4.14.146-93.123.amzn1.x86_64     perf-4.14.146-93.123.amzn1.x86_64     kernel-headers-4.14.146-93.123.amzn1.x86_64     kernel-tools-4.14.146-93.123.amzn1.x86_64     kernel-tools-devel-4.14.146-93.123.amzn1.x86_64     kernel-tools-debuginfo-4.14.146-93.123.amzn1.x86_64     kernel-devel-4.14.146-93.123.amzn1.x86_64     kernel-4.14.146-93.123.amzn1.x86_64     kernel-debuginfo-4.14.146-93.123.amzn1.x86_64     perf-debuginfo-4.14.146-93.123.amzn1.x86_64 ### Additional References Red Hat: [CVE-2019-14821](<https://access.redhat.com/security/cve/CVE-2019-14821>), [CVE-2019-14835](<https://access.redhat.com/security/cve/CVE-2019-14835>) Mitre: [CVE-2019-14821](<https://vulners.com/cve/CVE-2019-14821>), [CVE-2019-14835](<https://vulners.com/cve/CVE-2019-14835>)


Affected Package


OS OS Version Package Name Package Version
Amazon Linux 1 kernel-debuginfo 4.14.146-93.123.amzn1
Amazon Linux 1 kernel 4.14.146-93.123.amzn1
Amazon Linux 1 kernel-tools-devel 4.14.146-93.123.amzn1
Amazon Linux 1 kernel-headers 4.14.146-93.123.amzn1
Amazon Linux 1 kernel-debuginfo-common-i686 4.14.146-93.123.amzn1
Amazon Linux 1 perf-debuginfo 4.14.146-93.123.amzn1
Amazon Linux 1 kernel-devel 4.14.146-93.123.amzn1
Amazon Linux 1 perf 4.14.146-93.123.amzn1
Amazon Linux 1 kernel-tools 4.14.146-93.123.amzn1
Amazon Linux 1 kernel-tools-debuginfo 4.14.146-93.123.amzn1
Amazon Linux 1 kernel 4.14.146-93.123.amzn1
Amazon Linux 1 kernel-debuginfo-common-x86_64 4.14.146-93.123.amzn1
Amazon Linux 1 perf 4.14.146-93.123.amzn1
Amazon Linux 1 kernel-headers 4.14.146-93.123.amzn1
Amazon Linux 1 kernel-tools 4.14.146-93.123.amzn1
Amazon Linux 1 kernel-tools-devel 4.14.146-93.123.amzn1
Amazon Linux 1 kernel-tools-debuginfo 4.14.146-93.123.amzn1
Amazon Linux 1 kernel-devel 4.14.146-93.123.amzn1
Amazon Linux 1 kernel 4.14.146-93.123.amzn1
Amazon Linux 1 kernel-debuginfo 4.14.146-93.123.amzn1
Amazon Linux 1 perf-debuginfo 4.14.146-93.123.amzn1

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