Debian Security Advisory DSA 3981-1 (linux - security update)

Several vulnerabilities have been discovered in the Linux kernel that may lead to privilege escalation, denial of service or information leaks. CVE-2017-7518 Andy Lutomirski discovered that KVM is prone to an incorrect debug exception (#DB) error occurring while emulating a syscall instruction. A process inside a guest can take advantage of this flaw for privilege escalation inside a guest. CVE-2017-7558 (stretch only) Stefano Brivio of Red Hat discovered that the SCTP subsystem is prone to a data leak vulnerability due to an out-of-bounds read flaw, allowing to leak up to 100 uninitialized bytes to userspace. CVE-2017-10661 (jessie only) Dmitry Vyukov of Google reported that the timerfd facility does not properly handle certain concurrent operations on a single file descriptor. This allows a local attacker to cause a denial of service or potentially execute arbitrary code. Description truncated. Please see the references for more information.

linux on Debian Linux

This check tests the installed software version using the apt package manager.

For the oldstable distribution (jessie), these problems have been fixed in version 3.16.43-2+deb8u5. For the stable distribution (stretch), these problems have been fixed in version 4.9.30-2+deb9u5. We recommend that you upgrade your linux packages.