The SUSE Linux Enterprise 12 SP3 kernel was updated to 4.4.155 to receive various security and bugfixes.
The following security bugs were fixed:
CVE-2018-13093: Prevent NULL pointer dereference and panic in lookupslow()
on a NULL inode->iops pointer when doing pathwalks on a corrupted xfs image.
This occured because of a lack of proper validation that cached inodes are free
during allocation (bnc#1100001).
CVE-2018-13095: Prevent denial of service (memory corruption and BUG) that
could have occurred for a corrupted xfs image upon encountering an inode that
is in extent format, but has more extents than fit in the inode fork
(bnc#1099999).
CVE-2018-13094: Prevent OOPS that may have occured for a corrupted xfs image
after xfsdashrink_inode() is called with a NULL bp (bnc#1100000).
CVE-2018-12896: Prevent integer overflow in the POSIX timer code that was
caused by the way the overrun accounting works. Depending on interval and
expiry time values, the overrun can be larger than INTMAX, but the accounting
is int based. This basically made the accounting values, which are visible to
user space via timergetoverrun(2) and siginfo::sioverrun, random. This
allowed a local user to cause a denial of service (signed integer overflow) via
crafted mmap, futex, timercreate, and timer_settime system calls
(bnc#1099922).
CVE-2018-16658: Prevent information leak in cdromioctldrive_status that
could have been used by local attackers to read kernel memory (bnc#1107689).
CVE-2018-6555: The irdasetsockopt function allowed local users to cause a
denial of service (iasobject use-after-free and system crash) or possibly have
unspecified other impact via an AF_IRDA socket (bnc#1106511).
CVE-2018-6554: Prevent memory leak in the irdabind function that allowed
local users to cause a denial of service (memory consumption) by repeatedly
binding an AFIRDA socket (bnc#1106509).
CVE-2018-1129: A flaw was found in the way signature calculation was handled
by cephx authentication protocol. An attacker having access to ceph cluster
network who is able to alter the message payload was able to bypass signature
checks done by cephx protocol (bnc#1096748).
CVE-2018-1128: It was found that cephx authentication protocol did not verify
ceph clients correctly and was vulnerable to replay attack. Any attacker having
access to ceph cluster network who is able to sniff packets on network can use
this vulnerability to authenticate with ceph service and perform actions
allowed by ceph service (bnc#1096748).
CVE-2018-10938: A crafted network packet sent remotely by an attacker forced
the kernel to enter an infinite loop in the cipsov4optptr() function leading
to a denial-of-service (bnc#1106016).
CVE-2018-15572: The spectrev2select_mitigation function did not always fill
RSB upon a context switch, which made it easier for attackers to conduct
userspace-userspace spectreRSB attacks (bnc#1102517).
CVE-2018-10902: Protect against concurrent access to prevent double realloc
(double free) in sndrawmidiinputparams() and sndrawmidioutputstatus(). A
malicious local attacker could have used this for privilege escalation
(bnc#1105322 1105323).
CVE-2018-9363: Prevent buffer overflow in hidpprocessreport (bsc#1105292)
CVE-2018-10883: A local user could have caused an out-of-bounds write in
jbd2journaldirty_metadata(), a denial of service, and a system crash by
mounting and operating on a crafted ext4 filesystem image (bsc#1099863).
CVE-2018-10879: A local user could have caused a use-after-free in
ext4xattrset_entry function and a denial of service or unspecified other
impact by renaming a file in a crafted ext4 filesystem image (bsc#1099844).
CVE-2018-10878: A local user could have caused an out-of-bounds write and a
denial of service or unspecified other impact by mounting and operating a
crafted ext4 filesystem image (bsc#1099813).
CVE-2018-10876: A use-after-free was possible in ext4extremove_space()
function when mounting and operating a crafted ext4 image (bsc#1099811).
CVE-2018-10877: Prevent out-of-bound access in the ext4extdrop_refs()
function when operating on a crafted ext4 filesystem image (bsc#1099846).
CVE-2018-10881: A local user could have caused an out-of-bound access in
ext4getgroup_info function, a denial of service, and a system crash by
mounting and operating on a crafted ext4 filesystem image (bsc#1099864).
CVE-2018-10882: A local user could have caused an out-of-bound write, a
denial of service, and a system crash by unmounting a crafted ext4 filesystem
image (bsc#1099849).
CVE-2018-10880: Prevent stack-out-of-bounds write in the ext4 filesystem code
when mounting and writing to a crafted ext4 image in ext4updateinline_data().
An attacker could have used this to cause a system crash and a denial of
service (bsc#1099845).
The following non-security bugs were fixed:
9p/net: Fix zero-copy path in the 9p virtio transport (bnc#1012382).
9p/virtio: fix off-by-one error in sg list bounds check (bnc#1012382).