SUSE Security Update: Security update for the Linux Kernel
______________________________________________________________________________

Announcement ID:    SUSE-SU-2022:0477-1
Rating:             important
References:         #1012382 #1179960 #1183696 #1186207 #1192032 
                    #1192847 #1192877 #1192946 #1193157 #1193440 
                    #1193442 #1193575 #1193669 #1193727 #1193861 
                    #1193864 #1193867 #1194001 #1194087 #1194094 
                    #1194272 #1194302 #1194516 #1194529 #1194880 
                    
Cross-References:   CVE-2018-25020 CVE-2019-0136 CVE-2020-35519
                    CVE-2021-0935 CVE-2021-28711 CVE-2021-28712
                    CVE-2021-28713 CVE-2021-28715 CVE-2021-33098
                    CVE-2021-3564 CVE-2021-39648 CVE-2021-39657
                    CVE-2021-4002 CVE-2021-4083 CVE-2021-4149
                    CVE-2021-4155 CVE-2021-4197 CVE-2021-4202
                    CVE-2021-43976 CVE-2021-45095 CVE-2021-45485
                    CVE-2021-45486 CVE-2022-0330
CVSS scores:
                    CVE-2018-25020 (SUSE): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2019-0136 (NVD) : 7.4 CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
                    CVE-2019-0136 (SUSE): 7.4 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
                    CVE-2020-35519 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2020-35519 (SUSE): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-0935 (SUSE): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-28711 (NVD) : 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
                    CVE-2021-28711 (SUSE): 6.2 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
                    CVE-2021-28712 (NVD) : 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
                    CVE-2021-28712 (SUSE): 6.2 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
                    CVE-2021-28713 (NVD) : 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
                    CVE-2021-28713 (SUSE): 6.2 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
                    CVE-2021-28715 (NVD) : 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
                    CVE-2021-28715 (SUSE): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
                    CVE-2021-33098 (NVD) : 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
                    CVE-2021-33098 (SUSE): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
                    CVE-2021-3564 (NVD) : 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
                    CVE-2021-3564 (SUSE): 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
                    CVE-2021-39648 (SUSE): 4.4 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
                    CVE-2021-39657 (SUSE): 3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
                    CVE-2021-4002 (SUSE): 5.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
                    CVE-2021-4083 (SUSE): 7.4 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-4149 (SUSE): 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
                    CVE-2021-4155 (SUSE): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
                    CVE-2021-4197 (SUSE): 6.3 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
                    CVE-2021-4202 (SUSE): 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-43976 (SUSE): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
                    CVE-2021-45095 (NVD) : 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
                    CVE-2021-45095 (SUSE): 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
                    CVE-2021-45485 (NVD) : 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
                    CVE-2021-45485 (SUSE): 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
                    CVE-2021-45486 (NVD) : 3.5 CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
                    CVE-2021-45486 (SUSE): 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
                    CVE-2022-0330 (SUSE): 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Products:
                    SUSE Linux Enterprise Server 12-SP2-BCL
______________________________________________________________________________

   An update that solves 23 vulnerabilities and has two fixes
   is now available.

Description:


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

   The following security bugs were fixed:

   - CVE-2018-25020: Fixed an overflow in the BPF subsystem due to a
     mishandling of a long jump over an instruction sequence where inner
     instructions require substantial expansions into multiple BPF
     instructions. This affects kernel/bpf/core.c and net/core/filter.c
     (bnc#1193575).
   - CVE-2019-0136: Fixed insufficient access control in the Intel(R)
     PROSet/Wireless WiFi Software driver that may have allowed an
     unauthenticated user to potentially enable denial of service via
     adjacent access (bnc#1193157).
   - CVE-2020-35519: Fixed out-of-bounds memory access in x25_bind in
     net/x25/af_x25.c. A bounds check failure allowed a local attacker with a
     user account on the system to gain access to out-of-bounds memory,
     leading to a system crash or a leak of internal kernel information
     (bnc#1183696).
   - CVE-2021-0935: Fixed possible out of bounds write in ip6_xmit of
     ip6_output.c due to a use after free. This could lead to local
     escalation of privilege with System execution privileges needed. User
     interaction is not needed for exploitation (bnc#1192032).
   - CVE-2021-28711: Fixed issue with xen/blkfront to harden blkfront against
     event channel storms (XSA-391) (bsc#1193440).
   - CVE-2021-28712: Fixed issue with xen/netfront to harden netfront against
     event channel storms (XSA-391) (bsc#1193440).
   - CVE-2021-28713: Fixed issue with xen/console to harden hvc_xen against
     event channel storms (XSA-391) (bsc#1193440).
   - CVE-2021-28715: Fixed issue with xen/netback to do not queue unlimited
     number of packages (XSA-392) (bsc#1193442).
   - CVE-2021-33098: Fixed improper input validation in the Intel(R) Ethernet
     ixgbe driver that may have allowed an authenticated user to potentially
     cause denial of service via local access (bnc#1192877).
   - CVE-2021-3564: Fixed double-free memory corruption in the Linux kernel
     HCI device initialization subsystem that could have been used by
     attaching malicious HCI TTY Bluetooth devices. A local user could use
     this flaw to crash the system (bnc#1186207).
   - CVE-2021-39648: Fixed possible disclosure of kernel heap memory due to a
     race condition in gadget_dev_desc_UDC_show of configfs.c. This could
     lead to local information disclosure with System execution privileges
     needed. User interaction is not needed for exploitation (bnc#1193861).
   - CVE-2021-39657: Fixed out of bounds read due to a missing bounds check
     in ufshcd_eh_device_reset_handler of ufshcd.c. This could lead to local
     information disclosure with System execution privileges needed
     (bnc#1193864).
   - CVE-2021-4002: Fixed incorrect TLBs flush in hugetlbfs after
     huge_pmd_unshare (bsc#1192946).
   - CVE-2021-4083: Fixed a read-after-free memory flaw inside the garbage
     collection for Unix domain socket file handlers when users call close()
     and fget() simultaneouslyand can potentially trigger a race condition
     (bnc#1193727).
   - CVE-2021-4149: Fixed btrfs unlock newly allocated extent buffer after
     error (bsc#1194001).
   - CVE-2021-4155: Fixed XFS map issue when unwritten blocks in
     XFS_IOC_{ALLOC,FREE}SP just like fallocate (bsc#1194272).
   - CVE-2021-4197: Use cgroup open-time credentials for process migraton
     perm checks (bsc#1194302).
   - CVE-2021-4202: Fixed NFC race condition by adding NCI_UNREG flag
     (bsc#1194529).
   - CVE-2021-43976: Fixed insufficient access control in
     drivers/net/wireless/marvell/mwifiex/usb.c that allowed an attacker who
     connect a crafted USB device to cause denial of service (bnc#1192847).
   - CVE-2021-45095: Fixed refcount leak in pep_sock_accept in
     net/phonet/pep.c (bnc#1193867).
   - CVE-2021-45485: Fixed information leak in the IPv6 implementation in
     net/ipv6/output_core.c (bnc#1194094).
   - CVE-2021-45486: Fixed information leak inside the IPv4 implementation
     caused by very small hash table (bnc#1194087).
   - CVE-2022-0330: Fixed flush TLBs before releasing backing store
     (bsc#1194880).


   The following non-security bugs were fixed:

   - kprobes: Limit max data_size of the kretprobe instances (bsc#1193669).
   - memstick: rtsx_usb_ms: fix UAF
   - moxart: fix potential use-after-free on remove path (bsc1194516).
   - net/x25: fix a race in x25_bind() (networking-stable-19_03_15).
   - ring-buffer: Protect ring_buffer_reset() from reentrancy (bsc#1179960).
   - tty: hvc: replace BUG_ON() with negative return value (git-fixes).
   - xen-netfront: do not assume sk_buff_head list is empty in error handling
     (git-fixes).
   - xen-netfront: do not use ~0U as error return value for
     xennet_fill_frags() (git-fixes).
   - xen/blkfront: do not take local copy of a request from the ring page
     (git-fixes).
   - xen/blkfront: do not trust the backend response data blindly (git-fixes).
   - xen/blkfront: read response from backend only once (git-fixes).
   - xen/netfront: disentangle tx_skb_freelist (git-fixes).
   - xen/netfront: do not bug in case of too many frags (bnc#1012382).
   - xen/netfront: do not cache skb_shinfo() (bnc#1012382).
   - xen/netfront: do not read data from request on the ring page (git-fixes).
   - xen/netfront: do not trust the backend response data blindly (git-fixes).
   - xen/netfront: read response from backend only once (git-fixes).
   - xen: sync include/xen/interface/io/ring.h with Xen's newest version
     (git-fixes).


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-2022-477=1



Package List:

   - SUSE Linux Enterprise Server 12-SP2-BCL (noarch):

      kernel-devel-4.4.121-92.164.1
      kernel-macros-4.4.121-92.164.1
      kernel-source-4.4.121-92.164.1

   - SUSE Linux Enterprise Server 12-SP2-BCL (x86_64):

      kernel-default-4.4.121-92.164.1
      kernel-default-base-4.4.121-92.164.1
      kernel-default-base-debuginfo-4.4.121-92.164.1
      kernel-default-debuginfo-4.4.121-92.164.1
      kernel-default-debugsource-4.4.121-92.164.1
      kernel-default-devel-4.4.121-92.164.1
      kernel-syms-4.4.121-92.164.1


References:

   https://www.suse.com/security/cve/CVE-2018-25020.html
   https://www.suse.com/security/cve/CVE-2019-0136.html
   https://www.suse.com/security/cve/CVE-2020-35519.html
   https://www.suse.com/security/cve/CVE-2021-0935.html
   https://www.suse.com/security/cve/CVE-2021-28711.html
   https://www.suse.com/security/cve/CVE-2021-28712.html
   https://www.suse.com/security/cve/CVE-2021-28713.html
   https://www.suse.com/security/cve/CVE-2021-28715.html
   https://www.suse.com/security/cve/CVE-2021-33098.html
   https://www.suse.com/security/cve/CVE-2021-3564.html
   https://www.suse.com/security/cve/CVE-2021-39648.html
   https://www.suse.com/security/cve/CVE-2021-39657.html
   https://www.suse.com/security/cve/CVE-2021-4002.html
   https://www.suse.com/security/cve/CVE-2021-4083.html
   https://www.suse.com/security/cve/CVE-2021-4149.html
   https://www.suse.com/security/cve/CVE-2021-4155.html
   https://www.suse.com/security/cve/CVE-2021-4197.html
   https://www.suse.com/security/cve/CVE-2021-4202.html
   https://www.suse.com/security/cve/CVE-2021-43976.html
   https://www.suse.com/security/cve/CVE-2021-45095.html
   https://www.suse.com/security/cve/CVE-2021-45485.html
   https://www.suse.com/security/cve/CVE-2021-45486.html
   https://www.suse.com/security/cve/CVE-2022-0330.html
   https://bugzilla.suse.com/1012382
   https://bugzilla.suse.com/1179960
   https://bugzilla.suse.com/1183696
   https://bugzilla.suse.com/1186207
   https://bugzilla.suse.com/1192032
   https://bugzilla.suse.com/1192847
   https://bugzilla.suse.com/1192877
   https://bugzilla.suse.com/1192946
   https://bugzilla.suse.com/1193157
   https://bugzilla.suse.com/1193440
   https://bugzilla.suse.com/1193442
   https://bugzilla.suse.com/1193575
   https://bugzilla.suse.com/1193669
   https://bugzilla.suse.com/1193727
   https://bugzilla.suse.com/1193861
   https://bugzilla.suse.com/1193864
   https://bugzilla.suse.com/1193867
   https://bugzilla.suse.com/1194001
   https://bugzilla.suse.com/1194087
   https://bugzilla.suse.com/1194094
   https://bugzilla.suse.com/1194272
   https://bugzilla.suse.com/1194302
   https://bugzilla.suse.com/1194516
   https://bugzilla.suse.com/1194529
   https://bugzilla.suse.com/1194880