USN-2829-1: Linux kernel vulnerabilities
4 December 2015
Several security issues were fixed in the kernel.
Releases
Packages
- linux - Linux kernel
Details
It was discovered that the SCTP protocol implementation in the Linux kernel
performed an incorrect sequence of protocol-initialization steps. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2015-5283)
Dmitry Vyukov discovered that the Linux kernel's keyring handler attempted
to garbage collect incompletely instantiated keys. A local unprivileged
attacker could use this to cause a denial of service (system crash).
(CVE-2015-7872)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 15.04
-
linux-image-3.19.0-39-powerpc64-emb
-
3.19.0-39.44
-
linux-image-3.19.0-39-powerpc64-smp
-
3.19.0-39.44
-
linux-image-3.19.0-39-generic
-
3.19.0-39.44
-
linux-image-3.19.0-39-powerpc-smp
-
3.19.0-39.44
-
linux-image-3.19.0-39-generic-lpae
-
3.19.0-39.44
-
linux-image-3.19.0-39-powerpc-e500mc
-
3.19.0-39.44
-
linux-image-3.19.0-39-lowlatency
-
3.19.0-39.44
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.