Security update for the Linux Kernel

SUSE Security Update: Security update for the Linux Kernel
Announcement ID: SUSE-SU-2018:1855-2
Rating: important
References: #1068032 #1079152 #1082962 #1083650 #1083900 #1085185 #1086400 #1087007 #1087012 #1087036 #1087086 #1087095 #1089895 #1090534 #1090955 #1092497 #1092552 #1092813 #1092904 #1094033 #1094353 #1094823 #1095042 #1096140 #1096242 #1096281 #1096728 #1097356 #973378
Cross-References:CVE-2017-13305 CVE-2017-18241 CVE-2017-18249 CVE-2018-1000199 CVE-2018-1000204 CVE-2018-1065 CVE-2018-1092 CVE-2018-1093 CVE-2018-1094 CVE-2018-1130 CVE-2018-3665 CVE-2018-5803 CVE-2018-5848 CVE-2018-7492
Affected Products:
  • SUSE Linux Enterprise Server 12-SP2-BCL

An update that solves 14 vulnerabilities and has 15 fixes is now available.


The SUSE Linux Enterprise 12 SP2 LTSS kernel was updated receive various security and bugfixes.
The following security bugs were fixed:

  • CVE-2018-5848: In the function wmi_set_ie(), the length validation code did not handle unsigned integer overflow properly. As a result, a large value of the 'ie_len' argument could have caused a buffer overflow (bnc#1097356)
  • CVE-2018-1000204: Prevent infoleak caused by incorrect handling of the SG_IO ioctl (bsc#1096728).
  • CVE-2017-18249: The add_free_nid function did not properly track an allocated nid, which allowed local users to cause a denial of service (race condition) or possibly have unspecified other impact via concurrent threads (bnc#1087036)
  • CVE-2018-3665: Prevent disclosure of FPU registers (including XMM and AVX registers) between processes. These registers might contain encryption keys when doing SSE accelerated AES enc/decryption (bsc#1087086)
  • CVE-2017-18241: Prevent a NULL pointer dereference by using a noflush_merge option that triggers a NULL value for a flush_cmd_control data structure (bnc#1086400)
  • CVE-2017-13305: Prevent information disclosure vulnerability in encrypted-keys (bsc#1094353).
  • CVE-2018-1093: The ext4_valid_block_bitmap function allowed attackers to cause a denial of service (out-of-bounds read and system crash) via a crafted ext4 image because balloc.c and ialloc.c did not validate bitmap block numbers (bsc#1087095).
  • CVE-2018-1094: The ext4_fill_super function did not always initialize the crc32c checksum driver, which allowed attackers to cause a denial of service (ext4_xattr_inode_hash NULL pointer dereference and system crash) via a crafted ext4 image (bsc#1087007).
  • CVE-2018-1092: The ext4_iget function mishandled the case of a root directory with a zero i_links_count, which allowed attackers to cause a denial of service (ext4_process_freed_data NULL pointer dereference and OOPS) via a crafted ext4 image (bsc#1087012).
  • CVE-2018-1130: NULL pointer dereference in dccp_write_xmit() function that allowed a local user to cause a denial of service by a number of certain crafted system calls (bsc#1092904).
  • CVE-2018-1065: The netfilter subsystem mishandled the case of a rule blob that contains a jump but lacks a user-defined chain, which allowed local users to cause a denial of service (NULL pointer dereference) by leveraging the CAP_NET_RAW or CAP_NET_ADMIN capability (bsc#1083650).
  • CVE-2018-5803: Prevent error in the "_sctp_make_chunk()" function when handling SCTP packets length that could have been exploited to cause a kernel crash (bnc#1083900).
  • CVE-2018-7492: Prevent NULL pointer dereference in the net/rds/rdma.c __rds_rdma_map() function that allowed local attackers to cause a system panic and a denial-of-service, related to RDS_GET_MR and RDS_GET_MR_FOR_DEST (bsc#1082962).
  • CVE-2018-1000199: Prevent vulnerability in modify_user_hw_breakpoint() that could have caused a crash and possibly memory corruption (bsc#1089895).

The following non-security bugs were fixed:
  • ALSA: timer: Fix pause event notification (bsc#973378).
  • Fix excessive newline in /proc/*/status (bsc#1094823).
  • Fix the patch content (bsc#1085185)
  • KVM: x86: Sync back MSR_IA32_SPEC_CTRL to VCPU data structure (bsc#1096242, bsc#1096281).
  • Revert "bs-upload-kernel: do not set %opensuse_bs" This reverts commit e89e2b8cbef05df6c874ba70af3cb4c57f82a821.
  • ipv6: add mtu lock check in __ip6_rt_update_pmtu (bsc#1092552).
  • ipv6: omit traffic class when calculating flow hash (bsc#1095042).
  • kgraft/bnx2fc: Do not block kGraft in bnx2fc_l2_rcv kthread (bsc#1094033).
  • mm, page_alloc: do not break __GFP_THISNODE by zonelist reset (bsc#1079152, VM Functionality).
  • x86/boot: Fix early command-line parsing when partial word matches (bsc#1096140).
  • x86/bugs: IBRS: make runtime disabling fully dynamic (bsc#1096281).
  • x86/bugs: Respect retpoline command line option (bsc#1068032).
  • x86/bugs: correctly force-disable IBRS on !SKL systems (bsc#1092497).
  • x86/bugs: spec_ctrl must be cleared from cpu_caps_set when being disabled (bsc#1096140).
  • x86/kaiser: export symbol kaiser_set_shadow_pgd() (bsc#1092813)
  • xfs: convert XFS_AGFL_SIZE to a helper function (bsc#1090955, bsc#1090534).
  • xfs: detect agfl count corruption and reset agfl (bsc#1090955, bsc#1090534).
  • xfs: do not log/recover swapext extent owner changes for deleted inodes (bsc#1090955).

Special Instructions and Notes:

Please reboot the system after installing this update.

Patch Instructions:

To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

  • SUSE Linux Enterprise Server 12-SP2-BCL:
    zypper in -t patch SUSE-SLE-SERVER-12-SP2-BCL-2018-1251=1

Package List:

  • SUSE Linux Enterprise Server 12-SP2-BCL (x86_64):
    • kernel-default-4.4.121-92.85.1
    • kernel-default-base-4.4.121-92.85.1
    • kernel-default-base-debuginfo-4.4.121-92.85.1
    • kernel-default-debuginfo-4.4.121-92.85.1
    • kernel-default-debugsource-4.4.121-92.85.1
    • kernel-default-devel-4.4.121-92.85.1
    • kernel-syms-4.4.121-92.85.1
    • kgraft-patch-4_4_121-92_85-default-1-3.5.1
  • SUSE Linux Enterprise Server 12-SP2-BCL (noarch):
    • kernel-devel-4.4.121-92.85.1
    • kernel-macros-4.4.121-92.85.1
    • kernel-source-4.4.121-92.85.1