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             AUSCERT External Security Bulletin Redistribution

                   Security update for the Linux Kernel
                               16 June 2022


        AusCERT Security Bulletin Summary

Product:           Linux Kernel
Publisher:         SUSE
Operating System:  SUSE
Resolution:        Patch/Upgrade
CVE Names:         CVE-2022-30594 CVE-2022-28390 CVE-2022-28388
                   CVE-2022-21499 CVE-2022-21180 CVE-2022-21166
                   CVE-2022-21127 CVE-2022-21125 CVE-2022-21123
                   CVE-2022-1975 CVE-2022-1974 CVE-2022-1734
                   CVE-2022-1729 CVE-2022-1652 CVE-2022-1516
                   CVE-2022-1419 CVE-2022-1353 CVE-2022-1184
                   CVE-2022-1011 CVE-2021-38208 CVE-2021-33061
                   CVE-2021-28688 CVE-2021-20321 CVE-2021-20292
                   CVE-2020-10769 CVE-2019-19377 CVE-2018-20784
                   CVE-2018-7755 CVE-2017-13695 

Original Bulletin: 

Comment: CVSS (Max):  8.4 CVE-2022-30594 (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
         CVSS Source: SUSE
         Calculator:  https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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SUSE Security Update: Security update for the Linux Kernel


Announcement ID:   SUSE-SU-2022:2077-1
Rating:            important
References:        #1055710 #1065729 #1084513 #1087082 #1126703 #1158266
                   #1173265 #1182171 #1183646 #1183723 #1187055 #1191647
                   #1196426 #1197343 #1198031 #1198032 #1198516 #1198577
                   #1198660 #1198687 #1198742 #1199012 #1199063 #1199426
                   #1199505 #1199507 #1199605 #1199650 #1200143 #1200144
Cross-References:  CVE-2017-13695 CVE-2018-20784 CVE-2018-7755 CVE-2019-19377
                   CVE-2020-10769 CVE-2021-20292 CVE-2021-20321 CVE-2021-28688
                   CVE-2021-33061 CVE-2021-38208 CVE-2022-1011 CVE-2022-1184
                   CVE-2022-1353 CVE-2022-1419 CVE-2022-1516 CVE-2022-1652
                   CVE-2022-1729 CVE-2022-1734 CVE-2022-1974 CVE-2022-1975
                   CVE-2022-21123 CVE-2022-21125 CVE-2022-21127 CVE-2022-21166
                   CVE-2022-21180 CVE-2022-21499 CVE-2022-28388 CVE-2022-28390
Affected Products:
                   SUSE Linux Enterprise Server 12-SP2-BCL

An update that solves 29 vulnerabilities and has two fixes is now available.


The SUSE Linux Enterprise 12 SP2 kernel was updated.
The following security bugs were fixed:

  o CVE-2022-28390: Fixed a double free in drivers/net/can/usb/ems_usb.c
    vulnerability in the Linux kernel (bnc#1198031).
  o CVE-2022-28388: Fixed a double free in drivers/net/can/usb/usb_8dev.c
    vulnerability in the Linux kernel (bnc#1198032).
  o CVE-2018-20784: Fixed a denial of service (infinite loop in
    update_blocked_averages) by mishandled leaf cfs_rq in kernel/sched/fair.c
  o CVE-2018-7755: Fixed an issue in the fd_locked_ioctl function in drivers/
    block/floppy.c. The floppy driver will copy a kernel pointer to user memory
    in response to the FDGETPRM ioctl. An attacker can send the FDGETPRM ioctl
    and use the obtained kernel pointer to discover the location of kernel code
    and data and bypass kernel security protections such as KASLR (bnc#
  o CVE-2020-10769: Fixed a buffer over-read flaw in the IPsec Cryptographic
    algorithm's module. This flaw allowed a local attacker with user privileges
    to cause a denial of service. (bnc#1173265)
  o CVE-2021-28688: Fixed XSA-365 that includes initialization of pointers such
    that subsequent cleanup code wouldn't use uninitialized or stale values.
    This initialization went too far and may under certain conditions also
    overwrite pointers which are in need of cleaning up. The lack of cleanup
    would result in leaking persistent grants. The leak in turn would prevent
    fully cleaning up after a respective guest has died, leaving around zombie
    domains (bnc#1183646).
  o CVE-2022-21127: Fixed a stale MMIO data transient which can be exploited to
    speculatively/transiently disclose information via spectre like attacks.
  o CVE-2022-21123: Fixed a stale MMIO data transient which can be exploited to
    speculatively/transiently disclose information via spectre like attacks.
  o CVE-2022-21125: Fixed a stale MMIO data transient which can be exploited to
    speculatively/transiently disclose information via spectre like attacks.
  o CVE-2022-21180: Fixed a stale MMIO data transient which can be exploited to
    speculatively/transiently disclose information via spectre like attacks.
  o CVE-2022-21166: Fixed a stale MMIO data transient which can be exploited to
    speculatively/transiently disclose information via spectre like attacks.
  o CVE-2022-1975: Fixed a bug that allows an attacker to crash the linux
    kernel by simulating nfc device from user-space. (bsc#1200143)
  o CVE-2022-1974: Fixed an use-after-free that could causes kernel crash by
    simulating an nfc device from user-space. (bsc#1200144)
  o CVE-2019-19377: Fixed an user-after-free that could be triggered when an
    attacker mounts a crafted btrfs filesystem image. (bnc#1158266)
  o CVE-2022-1184: Fixed an use-after-free and memory errors in ext4 when
    mounting and operating on a corrupted image. (bsc#1198577)
  o CVE-2017-13695: Fixed a bug that caused a stack dump allowing local users
    to obtain sensitive information from kernel memory and bypass the KASLR
    protection mechanism via a crafted ACPI table. (bnc#1055710)
  o CVE-2022-1729: Fixed a sys_perf_event_open() race condition against self
  o CVE-2022-21499: Reinforce the kernel lockdown feature, until now it's been
    trivial to break out of it with kgdb or kdb. (bsc#1199426)
  o CVE-2022-1652: Fixed a statically allocated error counter inside the floppy
    kernel module (bsc#1199063).
  o CVE-2022-1734: Fixed a r/w use-after-free when non synchronized between
    cleanup routine and firmware download routine. (bnc#1199605)
  o CVE-2022-30594: Fixed restriction bypass on setting the PT_SUSPEND_SECCOMP
    flag (bnc#1199505).
  o CVE-2021-33061: Fixed insufficient control flow management for the Intel(R)
    82599 Ethernet Controllers and Adapters that may have allowed an
    authenticated user to potentially enable denial of service via local access
  o CVE-2022-1516: Fixed null-ptr-deref caused by x25_disconnect (bsc#1199012).
  o CVE-2021-20321: Fixed a race condition accessing file object in the
    OverlayFS subsystem in the way users do rename in specific way with
    OverlayFS. A local user could have used this flaw to crash the system (bnc#
  o CVE-2022-1419: Fixed a concurrency use-after-free in vgem_gem_dumb_create
  o CVE-2021-38208: Fixed a denial of service (NULL pointer dereference and
    BUG) by making a getsockname call after a certain type of failure of a bind
    call (bnc#1187055).
  o CVE-2022-1353: Fixed access controll to kernel memory in the pfkey_register
    function in net/key/af_key.c. (bnc#1198516)
  o CVE-2021-20292: Fixed object validation prior to performing operations on
    the object in nouveau_sgdma_create_ttm in Nouveau DRM subsystem (bnc#
  o CVE-2022-1011: Fixed an use-after-free vulnerability which could allow a
    local attacker to retireve (partial) /etc/shadow hashes or any other data
    from filesystem when he can mount a FUSE filesystems. (bnc#1197343)

The following non-security bugs were fixed:

  o btrfs: tree-checker: fix incorrect printk format (bsc#1200249).
  o powerpc/pseries: extract host bridge from pci_bus prior to bus removal (bsc
    #1182171 ltc#190900 bsc#1198660 ltc#197803).
  o powerpc/pseries: Fix use after free in remove_phb_dynamic() (bsc#1065729
    bsc#1198660 ltc#197803).
  o x86/speculation: Fix redundant MDS mitigation message (bsc#1199650).

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:

  o SUSE Linux Enterprise Server 12-SP2-BCL:
    zypper in -t patch SUSE-SLE-SERVER-12-SP2-BCL-2022-2077=1

Package List:

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


  o https://www.suse.com/security/cve/CVE-2017-13695.html
  o https://www.suse.com/security/cve/CVE-2018-20784.html
  o https://www.suse.com/security/cve/CVE-2018-7755.html
  o https://www.suse.com/security/cve/CVE-2019-19377.html
  o https://www.suse.com/security/cve/CVE-2020-10769.html
  o https://www.suse.com/security/cve/CVE-2021-20292.html
  o https://www.suse.com/security/cve/CVE-2021-20321.html
  o https://www.suse.com/security/cve/CVE-2021-28688.html
  o https://www.suse.com/security/cve/CVE-2021-33061.html
  o https://www.suse.com/security/cve/CVE-2021-38208.html
  o https://www.suse.com/security/cve/CVE-2022-1011.html
  o https://www.suse.com/security/cve/CVE-2022-1184.html
  o https://www.suse.com/security/cve/CVE-2022-1353.html
  o https://www.suse.com/security/cve/CVE-2022-1419.html
  o https://www.suse.com/security/cve/CVE-2022-1516.html
  o https://www.suse.com/security/cve/CVE-2022-1652.html
  o https://www.suse.com/security/cve/CVE-2022-1729.html
  o https://www.suse.com/security/cve/CVE-2022-1734.html
  o https://www.suse.com/security/cve/CVE-2022-1974.html
  o https://www.suse.com/security/cve/CVE-2022-1975.html
  o https://www.suse.com/security/cve/CVE-2022-21123.html
  o https://www.suse.com/security/cve/CVE-2022-21125.html
  o https://www.suse.com/security/cve/CVE-2022-21127.html
  o https://www.suse.com/security/cve/CVE-2022-21166.html
  o https://www.suse.com/security/cve/CVE-2022-21180.html
  o https://www.suse.com/security/cve/CVE-2022-21499.html
  o https://www.suse.com/security/cve/CVE-2022-28388.html
  o https://www.suse.com/security/cve/CVE-2022-28390.html
  o https://www.suse.com/security/cve/CVE-2022-30594.html
  o https://bugzilla.suse.com/1055710
  o https://bugzilla.suse.com/1065729
  o https://bugzilla.suse.com/1084513
  o https://bugzilla.suse.com/1087082
  o https://bugzilla.suse.com/1126703
  o https://bugzilla.suse.com/1158266
  o https://bugzilla.suse.com/1173265
  o https://bugzilla.suse.com/1182171
  o https://bugzilla.suse.com/1183646
  o https://bugzilla.suse.com/1183723
  o https://bugzilla.suse.com/1187055
  o https://bugzilla.suse.com/1191647
  o https://bugzilla.suse.com/1196426
  o https://bugzilla.suse.com/1197343
  o https://bugzilla.suse.com/1198031
  o https://bugzilla.suse.com/1198032
  o https://bugzilla.suse.com/1198516
  o https://bugzilla.suse.com/1198577
  o https://bugzilla.suse.com/1198660
  o https://bugzilla.suse.com/1198687
  o https://bugzilla.suse.com/1198742
  o https://bugzilla.suse.com/1199012
  o https://bugzilla.suse.com/1199063
  o https://bugzilla.suse.com/1199426
  o https://bugzilla.suse.com/1199505
  o https://bugzilla.suse.com/1199507
  o https://bugzilla.suse.com/1199605
  o https://bugzilla.suse.com/1199650
  o https://bugzilla.suse.com/1200143
  o https://bugzilla.suse.com/1200144
  o https://bugzilla.suse.com/1200249

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