Advisories ยป MGASA-2016-0345

Updated kernel packages fixes security vulnerablilities

Publication date: 18 Oct 2016
Type: security
Affected Mageia releases : 5
CVE: CVE-2016-4578 , CVE-2016-5243 , CVE-2016-5244 , CVE-2016-5400 , CVE-2016-6480 , CVE-2016-6480

Description

This update is based on the upstream 4.4.22 kernel and fixes atleast theese
security issues:

sound/core/timer.c in the Linux kernel through 4.6 does not initialize 
certain r1 data structures, which allows local users to obtain sensitive
information from kernel stack memory via crafted use of the ALSA timer
interface, related to the (1) snd_timer_user_ccallback and (2)
snd_timer_user_tinterrupt functions (CVE-2016-4578).

The tipc_nl_compat_link_dump function in net/tipc/netlink_compat.c in the
Linux kernel through 4.6.3 does not properly copy a certain string, which
allows local users to obtain sensitive information from kernel stack memory
by reading a Netlink message (CVE-2016-5243).

The rds_inc_info_copy function in net/rds/recv.c in the Linux kernel through
4.6.3 does not initialize a certain structure member, which allows remote
attackers to obtain sensitive information from kernel stack memory by reading
an RDS message (CVE-2016-5244).

Memory leak in the airspy_probe function in drivers/media/usb/airspy/airspy.c
in the airspy USB driver in the Linux kernel before 4.7 allows local users 
to cause a denial of service (memory consumption) via a crafted USB device
that emulates many VFL_TYPE_SDR or VFL_TYPE_SUBDEV devices and performs many
connect and disconnect operations (CVE-2016-5400).

Race condition in the ioctl_send_fib function in drivers/scsi/aacraid/
commctrl.c in the Linux kernel through 4.7 allows local users to cause a
denial of service (out-of-bounds access or system crash) by changing a
certain size value, aka a "double fetch" vulnerability (CVE-2016-6480).

This update also changes the following:
- enables STRICT_DEVMEM as a security hardening
- disables FW_LOADER_USER_HELPER_FALLBACK again (un-intentionally 
  enabled in 4.4 series upgrade) that slows down boot or even makes
  wireless connection fail with drivers with multiple possible
  firmwares (mga#19390).

For other fixes in this update, see the referenced changelogs.
                

References

SRPMS

5/core