Debian Security Advisory
DSA-3396-1 linux -- security update
- Date Reported:
- 10 Nov 2015
- Affected Packages:
- linux
- Vulnerable:
- Yes
- 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.
- CVE-2015-5307
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. - CVE-2015-7833
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.
- CVE-2015-7872
Dmitry Vyukov discovered a vulnerability in the keyrings garbage collector allowing a local user to trigger a kernel panic.
- CVE-2015-7990
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.
- CVE-2015-5307