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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 leak. * [CVE-2015-7513](https://security-tracker.debian.org/tracker/CVE-2015-7513) It was discovered that a local user permitted to use the x86 KVM subsystem could configure the PIT emulation to cause a denial of service (crash). * [CVE-2015-7550](https://security-tracker.debian.org/tracker/CVE-2015-7550) Dmitry Vyukov discovered a race condition in the keyring subsystem that allows a local user to cause a denial of service (crash). * [CVE-2015-8543](https://security-tracker.debian.org/tracker/CVE-2015-8543) It was discovered that a local user permitted to create raw sockets could cause a denial-of-service by specifying an invalid protocol number for the socket. The attacker must have the CAP\_NET\_RAW capability. * [CVE-2015-8550](https://security-tracker.debian.org/tracker/CVE-2015-8550) Felix Wilhelm of ERNW discovered that the Xen PV backend drivers may read critical data from shared memory multiple times. This flaw can be used by a guest kernel to cause a denial of service (crash) on the host, or possibly for privilege escalation. * [CVE-2015-8551](https://security-tracker.debian.org/tracker/CVE-2015-8551) / [CVE-2015-8552](https://security-tracker.debian.org/tracker/CVE-2015-8552) Konrad Rzeszutek Wilk of Oracle discovered that the Xen PCI backend driver does not adequately validate the device state when a guest configures MSIs. This flaw can be used by a guest kernel to cause a denial of service (crash or disk space exhaustion) on the host. * [CVE-2015-8569](https://security-tracker.debian.org/tracker/CVE-2015-8569) Dmitry Vyukov discovered a flaw in the PPTP sockets implementation that leads to an information leak to local users. * [CVE-2015-8575](https://security-tracker.debian.org/tracker/CVE-2015-8575) David Miller discovered a flaw in the Bluetooth SCO sockets implementation that leads to an information leak to local users. * [CVE-2015-8709](https://security-tracker.debian.org/tracker/CVE-2015-8709) Jann Horn discovered a flaw in the permission checks for use of the ptrace feature. A local user who has the CAP\_SYS\_PTRACE capability within their own user namespace could use this flaw for privilege escalation if a more privileged process ever enters that user namespace. This affects at least the LXC system. In addition, this update fixes some regressions in the previous update: * [#808293](https://bugs.debian.org/808293) A regression in the UDP implementation prevented freeradius and some other applications from receiving data. * [#808602](https://bugs.debian.org/808602) / [#808953](https://bugs.debian.org/808953) A regression in the USB XHCI driver prevented use of some devices in USB 3 SuperSpeed ports. * [#808973](https://bugs.debian.org/808973) A fix to the radeon driver interacted with an existing bug to cause a crash at boot when using some AMD/ATI graphics cards. This issue only affects wheezy. For the oldstable distribution (wheezy), these problems have been fixed in version 3.2.73-2+deb7u2. The oldstable distribution (wheezy) is not affected by [CVE-2015-8709](https://security-tracker.debian.org/tracker/CVE-2015-8709). For the stable distribution (jessie), these problems have been fixed in version 3.16.7-ckt20-1+deb8u2. [CVE-2015-8543](https://security-tracker.debian.org/tracker/CVE-2015-8543) was already fixed in version 3.16.7-ckt20-1+deb8u1. For the unstable distribution (sid), these problems have been fixed in version 4.3.3-3 or earlier. We recommend that you upgrade your linux packages.


Affected Software


CPE Name Name Version
linux 3.16.7-ckt11-1
linux 3.16.7-ckt11-1+deb8u1
linux 3.16.7-ckt11-1+deb8u2
linux 3.16.7-ckt11-1+deb8u2~bpo70+1
linux 3.16.7-ckt11-1+deb8u3
linux 3.16.7-ckt11-1+deb8u3~bpo70+1
linux 3.16.7-ckt11-1+deb8u4
linux 3.16.7-ckt11-1+deb8u4~bpo70+1
linux 3.16.7-ckt11-1+deb8u5
linux 3.16.7-ckt11-1+deb8u6
linux 3.16.7-ckt11-1+deb8u6~bpo70+1
linux 3.16.7-ckt11-1~bpo70+1
linux 3.16.7-ckt17-1
linux 3.16.7-ckt20-1
linux 3.16.7-ckt20-1+deb8u1
linux 3.16.7-ckt20-1+deb8u2~bpo70+1
linux 3.16.7-ckt9-2
linux 3.16.7-ckt9-3
linux 3.16.7-ckt9-3~deb8u1
linux 3.16.7-ckt9-3~deb8u1~bpo70+1

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