Security update for the Linux Kernel

SUSE Security Update: Security update for the Linux Kernel
Announcement ID: SUSE-SU-2021:0437-1
Rating: important
References: #1070943 #1121826 #1121872 #1157298 #1168952 #1173942 #1176395 #1176485 #1177411 #1178123 #1178182 #1178589 #1178622 #1178886 #1179107 #1179140 #1179141 #1179204 #1179419 #1179508 #1179509 #1179601 #1179616 #1179663 #1179666 #1179745 #1179877 #1179960 #1179961 #1180008 #1180027 #1180028 #1180029 #1180030 #1180031 #1180032 #1180052 #1180086 #1180559 #1180562 #1181349 #969755
Cross-References:CVE-2019-19063 CVE-2019-20934 CVE-2019-6133 CVE-2020-0444 CVE-2020-0465 CVE-2020-0466 CVE-2020-11668 CVE-2020-15436 CVE-2020-15437 CVE-2020-25211 CVE-2020-25285 CVE-2020-25668 CVE-2020-25669 CVE-2020-27068 CVE-2020-27673 CVE-2020-27777 CVE-2020-27786 CVE-2020-27825 CVE-2020-28915 CVE-2020-28974 CVE-2020-29568 CVE-2020-29569 CVE-2020-29660 CVE-2020-29661 CVE-2020-36158 CVE-2021-3347
Affected Products:
  • SUSE OpenStack Cloud 7
  • SUSE Linux Enterprise Server for SAP 12-SP2
  • SUSE Linux Enterprise Server 12-SP2-LTSS
  • SUSE Linux Enterprise Server 12-SP2-BCL
  • SUSE Linux Enterprise High Availability 12-SP2

An update that solves 26 vulnerabilities and has 16 fixes is now available.

Description:

The SUSE Linux Enterprise 12 SP2 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

  • CVE-2021-3347: A use-after-free was discovered in the PI futexes during fault handling, allowing local users to execute code in the kernel (bnc#1181349).
  • CVE-2020-29569: Fixed a potential privilege escalation and information leaks related to the PV block backend, as used by Xen (bnc#1179509).
  • CVE-2020-29568: Fixed a denial of service issue, related to processing watch events (bnc#1179508).
  • CVE-2020-25211: Fixed a flaw where a local attacker was able to inject conntrack netlink configuration that could cause a denial of service or trigger the use of incorrect protocol numbers in ctnetlink_parse_tuple_filter (bnc#1176395).
  • CVE-2020-0444: Fixed a bad kfree due to a logic error in audit_data_to_entry (bnc#1180027).
  • CVE-2020-0465: Fixed multiple missing bounds checks in hid-multitouch.c that could have led to local privilege escalation (bnc#1180029).
  • CVE-2020-0466: Fixed a use-after-free due to a logic error in do_epoll_ctl and ep_loop_check_proc of eventpoll.c (bnc#1180031).
  • CVE-2020-15436: Fixed a use after free vulnerability in fs/block_dev.c which could have allowed local users to gain privileges or cause a denial of service (bsc#1179141).
  • CVE-2020-27068: Fixed an out-of-bounds read due to a missing bounds check in the nl80211_policy policy of nl80211.c (bnc#1180086).
  • CVE-2020-27777: Fixed a privilege escalation in the Run-Time Abstraction Services (RTAS) interface, affecting guests running on top of PowerVM or KVM hypervisors (bnc#1179107).
  • CVE-2020-27786: Fixed an out-of-bounds write in the MIDI implementation (bnc#1179601).
  • CVE-2020-27825: Fixed a race in the trace_open and buffer resize calls (bsc#1179960).
  • CVE-2020-29660: Fixed a locking inconsistency in the tty subsystem that may have allowed a read-after-free attack against TIOCGSID (bnc#1179745).
  • CVE-2020-29661: Fixed a locking issue in the tty subsystem that allowed a use-after-free attack against TIOCSPGRP (bsc#1179745).
  • CVE-2020-28974: Fixed a slab-out-of-bounds read in fbcon which could have been used by local attackers to read privileged information or potentially crash the kernel (bsc#1178589).
  • CVE-2020-28915: Fixed a buffer over-read in the fbcon code which could have been used by local attackers to read kernel memory (bsc#1178886).
  • CVE-2020-25669: Fixed a use-after-free read in sunkbd_reinit() (bsc#1178182).
  • CVE-2020-25285: A race condition between hugetlb sysctl handlers in mm/hugetlb.c could be used by local attackers to corrupt memory, cause a NULL pointer dereference, or possibly have unspecified other impact (bnc#1176485 ).
  • CVE-2020-15437: Fixed a null pointer dereference which could have allowed local users to cause a denial of service (bsc#1179140).
  • CVE-2020-36158: Fixed a potential remote code execution in the Marvell mwifiex driver (bsc#1180559).
  • CVE-2020-11668: Fixed the mishandling of invalid descriptors in the Xirlink camera USB driver (bnc#1168952).
  • CVE-2020-25668: Fixed a use-after-free in con_font_op() (bsc#1178123).
  • CVE-2020-27673: Fixed an issue where rogue guests could have caused denial of service of Dom0 via high frequency events (XSA-332 bsc#1177411)
  • CVE-2019-20934: Fixed a use-after-free in show_numa_stats() because NUMA fault statistics were inappropriately freed (bsc#1179663).
  • CVE-2019-19063: Fixed two memory leaks in the rtl_usb_probe() which could eventually have allowed attackers to cause a denial of service (memory consumption) (bnc#1157298 ).
  • CVE-2019-6133: Fixed an issue where the "start time" protection mechanism could have been bypassed and therefore authorization decisions are improperly cached (bsc#1128172).

The following non-security bugs were fixed:
  • HID: Fix slab-out-of-bounds read in hid_field_extract (bsc#1180052).
  • epoll: Keep a reference on files added to the check list (bsc#1180031).
  • fix regression in "epoll: Keep a reference on files added to the check list" (bsc#1180031, git-fixes).
  • futex,rt_mutex: Fix rt_mutex_cleanup_proxy_lock() (bsc#969755).
  • futex,rt_mutex: Introduce rt_mutex_init_waiter() (bsc#969755).
  • futex,rt_mutex: Provide futex specific rt_mutex API (bsc#969755).
  • futex,rt_mutex: Restructure rt_mutex_finish_proxy_lock() (bsc#969755).
  • futex: Avoid freeing an active timer (bsc#969755).
  • futex: Avoid violating the 10th rule of futex (bsc#969755).
  • futex: Change locking rules (bsc#969755).
  • futex: Do not enable IRQs unconditionally in put_pi_state() (bsc#969755).
  • futex: Drop hb->lock before enqueueing on the rtmutex (bsc#969755).
  • futex: Fix OWNER_DEAD fixup (bsc#969755).
  • futex: Fix incorrect should_fail_futex() handling (bsc#969755).
  • futex: Fix more put_pi_state() vs. exit_pi_state_list() races (bsc#969755).
  • futex: Fix pi_state->owner serialization (bsc#969755).
  • futex: Fix small (and harmless looking) inconsistencies (bsc#969755).
  • futex: Futex_unlock_pi() determinism (bsc#969755).
  • futex: Handle early deadlock return correctly (bsc#969755).
  • futex: Handle transient "ownerless" rtmutex state correctly (bsc#969755).
  • futex: Pull rt_mutex_futex_unlock() out from under hb->lock (bsc#969755).
  • futex: Rework futex_lock_pi() to use rt_mutex_*_proxy_lock() (bsc#969755).
  • futex: Rework inconsistent rt_mutex/futex_q state (bsc#969755).
  • locking/futex: Allow low-level atomic operations to return -EAGAIN (bsc#969755).
  • mm/userfaultfd: do not access vma->vm_mm after calling handle_userfault() (bsc#1179204).

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 OpenStack Cloud 7:
    zypper in -t patch SUSE-OpenStack-Cloud-7-2021-437=1
  • SUSE Linux Enterprise Server for SAP 12-SP2:
    zypper in -t patch SUSE-SLE-SAP-12-SP2-2021-437=1
  • SUSE Linux Enterprise Server 12-SP2-LTSS:
    zypper in -t patch SUSE-SLE-SERVER-12-SP2-2021-437=1
  • SUSE Linux Enterprise Server 12-SP2-BCL:
    zypper in -t patch SUSE-SLE-SERVER-12-SP2-BCL-2021-437=1
  • SUSE Linux Enterprise High Availability 12-SP2:
    zypper in -t patch SUSE-SLE-HA-12-SP2-2021-437=1

Package List:

  • SUSE OpenStack Cloud 7 (s390x x86_64):
    • kernel-default-4.4.121-92.149.1
    • kernel-default-base-4.4.121-92.149.1
    • kernel-default-base-debuginfo-4.4.121-92.149.1
    • kernel-default-debuginfo-4.4.121-92.149.1
    • kernel-default-debugsource-4.4.121-92.149.1
    • kernel-default-devel-4.4.121-92.149.1
    • kernel-syms-4.4.121-92.149.1
  • SUSE OpenStack Cloud 7 (noarch):
    • kernel-devel-4.4.121-92.149.1
    • kernel-macros-4.4.121-92.149.1
    • kernel-source-4.4.121-92.149.1
  • SUSE OpenStack Cloud 7 (x86_64):
    • kgraft-patch-4_4_121-92_149-default-1-3.3.1
  • SUSE OpenStack Cloud 7 (s390x):
    • kernel-default-man-4.4.121-92.149.1
  • SUSE Linux Enterprise Server for SAP 12-SP2 (ppc64le x86_64):
    • kernel-default-4.4.121-92.149.1
    • kernel-default-base-4.4.121-92.149.1
    • kernel-default-base-debuginfo-4.4.121-92.149.1
    • kernel-default-debuginfo-4.4.121-92.149.1
    • kernel-default-debugsource-4.4.121-92.149.1
    • kernel-default-devel-4.4.121-92.149.1
    • kernel-syms-4.4.121-92.149.1
    • kgraft-patch-4_4_121-92_149-default-1-3.3.1
  • SUSE Linux Enterprise Server for SAP 12-SP2 (noarch):
    • kernel-devel-4.4.121-92.149.1
    • kernel-macros-4.4.121-92.149.1
    • kernel-source-4.4.121-92.149.1
  • SUSE Linux Enterprise Server 12-SP2-LTSS (ppc64le s390x x86_64):
    • kernel-default-4.4.121-92.149.1
    • kernel-default-base-4.4.121-92.149.1
    • kernel-default-base-debuginfo-4.4.121-92.149.1
    • kernel-default-debuginfo-4.4.121-92.149.1
    • kernel-default-debugsource-4.4.121-92.149.1
    • kernel-default-devel-4.4.121-92.149.1
    • kernel-syms-4.4.121-92.149.1
  • SUSE Linux Enterprise Server 12-SP2-LTSS (ppc64le x86_64):
    • kgraft-patch-4_4_121-92_149-default-1-3.3.1
  • SUSE Linux Enterprise Server 12-SP2-LTSS (noarch):
    • kernel-devel-4.4.121-92.149.1
    • kernel-macros-4.4.121-92.149.1
    • kernel-source-4.4.121-92.149.1
  • SUSE Linux Enterprise Server 12-SP2-LTSS (s390x):
    • kernel-default-man-4.4.121-92.149.1
  • SUSE Linux Enterprise Server 12-SP2-BCL (x86_64):
    • kernel-default-4.4.121-92.149.1
    • kernel-default-base-4.4.121-92.149.1
    • kernel-default-base-debuginfo-4.4.121-92.149.1
    • kernel-default-debuginfo-4.4.121-92.149.1
    • kernel-default-debugsource-4.4.121-92.149.1
    • kernel-default-devel-4.4.121-92.149.1
    • kernel-syms-4.4.121-92.149.1
  • SUSE Linux Enterprise Server 12-SP2-BCL (noarch):
    • kernel-devel-4.4.121-92.149.1
    • kernel-macros-4.4.121-92.149.1
    • kernel-source-4.4.121-92.149.1
  • SUSE Linux Enterprise High Availability 12-SP2 (ppc64le s390x x86_64):
    • cluster-md-kmp-default-4.4.121-92.149.1
    • cluster-md-kmp-default-debuginfo-4.4.121-92.149.1
    • cluster-network-kmp-default-4.4.121-92.149.1
    • cluster-network-kmp-default-debuginfo-4.4.121-92.149.1
    • dlm-kmp-default-4.4.121-92.149.1
    • dlm-kmp-default-debuginfo-4.4.121-92.149.1
    • gfs2-kmp-default-4.4.121-92.149.1
    • gfs2-kmp-default-debuginfo-4.4.121-92.149.1
    • kernel-default-debuginfo-4.4.121-92.149.1
    • kernel-default-debugsource-4.4.121-92.149.1
    • ocfs2-kmp-default-4.4.121-92.149.1
    • ocfs2-kmp-default-debuginfo-4.4.121-92.149.1

References: