The SUSE Linux Enterprise 12 SP4 kernel was updated to receive various
security and bugfixes.
The following security bugs were fixed:
- CVE-2019-11477: A sequence of SACKs may have been crafted such that one
can trigger an integer overflow, leading to a kernel panic.
- CVE-2019-11478: It was possible to send a crafted sequence of SACKs
which will fragment the TCP retransmission queue. An attacker may have
been able to further exploit the fragmented queue to cause an expensive
linked-list walk for subsequent SACKs received for that same TCP
- CVE-2019-11479: An attacker could force the Linux kernel to segment its
responses into multiple TCP segments. This would drastically increased
the bandwidth required to deliver the same amount of data. Further, it
would consume additional resources such as CPU and NIC processing power.
- CVE-2019-3846: A flaw that allowed an attacker to corrupt memory and
possibly escalate privileges was found in the mwifiex kernel module
while connecting to a malicious wireless network. (bnc#1136424)
- CVE-2019-12382: An issue was discovered in drm_load_edid_firmware in
drivers/gpu/drm/drm_edid_load.c in the Linux kernel, there was an
unchecked kstrdup of fwstr, which might have allowed an attacker to
cause a denial of service (NULL pointer dereference and system crash).
- CVE-2019-5489: The mincore() implementation in mm/mincore.c in the Linux
kernel allowed local attackers to observe page cache access patterns of
other processes on the same system, potentially allowing sniffing of
secret information. (Fixing this affects the output of the fincore
program.) Limited remote exploitation may have been possible, as
demonstrated by latency differences in accessing public files from an
Apache HTTP Server. (bnc#1120843)
- CVE-2019-11487: The Linux kernel allowed page reference count overflow,
with resultant use-after-free issues, if about 140 GiB of RAM existed.
It could have occured with FUSE requests. (bnc#1133190)
- CVE-2019-11833: fs/ext4/extents.c in the Linux kernel did not zero out
the unused memory region in the extent tree block, which might have
allowed local users to obtain sensitive information by reading
uninitialized data in the filesystem. (bnc#1135281)
- CVE-2018-7191: In the tun subsystem in the Linux kernel,
dev_get_valid_name was not called before register_netdevice. This
allowed local users to cause a denial of service (NULL pointer
dereference and panic) via an ioctl(TUNSETIFF) call with a dev name
containing a / character. (bnc#1135603)
- CVE-2019-11085: Insufficient input validation in Kernel Mode Driver in
i915 Graphics for Linux may have allowed an authenticated user to
potentially enable escalation of privilege via local access.
- CVE-2019-11815: An issue was discovered in rds_tcp_kill_sock in
net/rds/tcp.c in the Linux kernel There was a race condition leading to
a use-after-free, related to net namespace cleanup. (bnc#1134537)
- CVE-2019-11884: The do_hidp_sock_ioctl function in
net/bluetooth/hidp/sock.c in the Linux kernel allowed a local user to
obtain potentially sensitive information from kernel stack memory via a
hidPCONNADD command, because a name field may not end with a '\0'
- CVE-2019-11486: The Siemens R3964 line discipline driver in
drivers/tty/n_r3964.c in the Linux kernel had multiple race conditions.
The following non-security bugs were fixed: http://lists.suse.com/pipermail/sle-security-updates/2019-June/005572.html