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linux - security update

Description

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks. * [CVE-2019-14821](https://security-tracker.debian.org/tracker/CVE-2019-14821) Matt Delco reported a race condition in KVM's coalesced MMIO facility, which could lead to out-of-bounds access in the kernel. A local attacker permitted to access /dev/kvm could use this to cause a denial of service (memory corruption or crash) or possibly for privilege escalation. * [CVE-2019-14835](https://security-tracker.debian.org/tracker/CVE-2019-14835) Peter Pi of Tencent Blade Team discovered a missing bounds check in vhost\_net, the network back-end driver for KVM hosts, leading to a buffer overflow when the host begins live migration of a VM. An attacker in control of a VM could use this to cause a denial of service (memory corruption or crash) or possibly for privilege escalation on the host. * [CVE-2019-15117](https://security-tracker.debian.org/tracker/CVE-2019-15117) Hui Peng and Mathias Payer reported a missing bounds check in the usb-audio driver's descriptor parsing code, leading to a buffer over-read. An attacker able to add USB devices could possibly use this to cause a denial of service (crash). * [CVE-2019-15118](https://security-tracker.debian.org/tracker/CVE-2019-15118) Hui Peng and Mathias Payer reported unbounded recursion in the usb-audio driver's descriptor parsing code, leading to a stack overflow. An attacker able to add USB devices could use this to cause a denial of service (memory corruption or crash) or possibly for privilege escalation. On the amd64 architecture, and on the arm64 architecture in buster, this is mitigated by a guard page on the kernel stack, so that it is only possible to cause a crash. * [CVE-2019-15902](https://security-tracker.debian.org/tracker/CVE-2019-15902) Brad Spengler reported that a backporting error reintroduced a spectre-v1 vulnerability in the ptrace subsystem in the ptrace\_get\_debugreg() function. For the oldstable distribution (stretch), these problems have been fixed in version 4.9.189-3+deb9u1. For the stable distribution (buster), these problems have been fixed in version 4.19.67-2+deb10u1. We recommend that you upgrade your linux packages. For the detailed security status of linux please refer to its security tracker page at: <https://security-tracker.debian.org/tracker/linux>


Affected Software


CPE Name Name Version
linux 4.19.37-5+deb10u2~bpo9+1
linux 4.19.37-6
linux 4.19.37-5+deb10u2
linux 4.19.67-1
linux 4.19.67-2+deb10u1~bpo9+1
linux 4.19.67-2
linux 4.19.67-2~bpo9+1
linux 4.19.37-5+deb10u1
linux 4.19.37-5

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