Debian Security Advisory
DSA-3396-1 linux -- security update
- Date Reported:
- 10 Nov 2015
- Affected Packages:
- Security database references:
- In Mitre's CVE dictionary: CVE-2015-5307, CVE-2015-7833, CVE-2015-7872, CVE-2015-7990.
- More information:
Several vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service.
Ben Serebrin from Google discovered a guest to host denial of service flaw affecting the KVM hypervisor. A malicious guest can trigger an infinite stream of
alignment check(#AC) exceptions causing the processor microcode to enter an infinite loop where the core never receives another interrupt. This leads to a panic of the host kernel.
Sergej Schumilo, Hendrik Schwartke and Ralf Spenneberg discovered a flaw in the processing of certain USB device descriptors in the usbvision driver. An attacker with physical access to the system can use this flaw to crash the system.
Dmitry Vyukov discovered a vulnerability in the keyrings garbage collector allowing a local user to trigger a kernel panic.
It was discovered that the fix for CVE-2015-6937 was incomplete. A race condition when sending a message on unbound socket can still cause a NULL pointer dereference. A remote attacker might be able to cause a denial of service (crash) by sending a crafted packet.
For the oldstable distribution (wheezy), these problems have been fixed in version 3.2.68-1+deb7u6.
For the stable distribution (jessie), these problems have been fixed in version 3.16.7-ckt11-1+deb8u6.
We recommend that you upgrade your linux packages.