SUSE-SU-2021:2577-1: important: Security update for the Linux Kernel (Live Patch 15 for SLE 15 SP2)

sle-security-updates at sle-security-updates at
Fri Jul 30 19:15:52 UTC 2021

   SUSE Security Update: Security update for the Linux Kernel (Live Patch 15 for SLE 15 SP2)

Announcement ID:    SUSE-SU-2021:2577-1
Rating:             important
References:         #1182717 #1183120 #1183491 #1183658 #1184171 
                    #1184710 #1184952 #1185847 #1185899 #1185901 
                    #1186285 #1187052 #1188117 #1188257 
Cross-References:   CVE-2020-36322 CVE-2020-36385 CVE-2021-22555
                    CVE-2021-23133 CVE-2021-27363 CVE-2021-27364
                    CVE-2021-27365 CVE-2021-28660 CVE-2021-28688
                    CVE-2021-29154 CVE-2021-32399 CVE-2021-33034
                    CVE-2021-33909 CVE-2021-3444
CVSS scores:
                    CVE-2020-36322 (NVD) : 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
                    CVE-2020-36322 (SUSE): 7.7 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
                    CVE-2020-36385 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
                    CVE-2020-36385 (SUSE): 8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-22555 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-22555 (SUSE): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-23133 (NVD) : 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-23133 (SUSE): 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-27363 (NVD) : 4.4 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
                    CVE-2021-27363 (SUSE): 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
                    CVE-2021-27364 (NVD) : 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
                    CVE-2021-27364 (SUSE): 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
                    CVE-2021-27365 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-27365 (SUSE): 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-28660 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-28660 (SUSE): 8 CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
                    CVE-2021-28688 (NVD) : 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
                    CVE-2021-28688 (SUSE): 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
                    CVE-2021-29154 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-29154 (SUSE): 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-32399 (NVD) : 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-32399 (SUSE): 7.4 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-33034 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-33034 (SUSE): 7.7 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
                    CVE-2021-33909 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-33909 (SUSE): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-3444 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-3444 (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 Module for Live Patching 15-SP2

   An update that fixes 14 vulnerabilities is now available.


   This update for the Linux Kernel 5.3.18-24_53_4 fixes several issues.

   The following security issues were fixed:

   - CVE-2021-33909: Fixed an out-of-bounds write in the filesystem layer
     that allows to andobtain full root privileges. (bsc#1188062)
   - CVE-2021-22555: Fixed an heap out-of-bounds write in
     net/netfilter/x_tables.c that could allow local provilege escalation.
   - CVE-2020-36385: Fixed a use-after-free vulnerability reached via the
     ctx_list in some ucma_migrate_id situations where ucma_close is called.
   - CVE-2021-23133: Fixed a race condition in the SCTP sockets that could
     lead to kernel privilege escalation from the context of a network
     service or an unprivileged process. (bnc#1184675)
   - CVE-2021-33034: Fixed a use-after-free vulnerability when destroying an
     hci_chan which leads to writing an arbitrary value. (bnc#1186111)
   - CVE-2021-32399: Fixed a race condition in net/bluetooth/hci_request.c
     for removal of the HCI controller. (bsc#1184611)
   - CVE-2020-36322: Fixed an issue in the FUSE filesystem implementation.
     This bug was addressed with a previous fix, which turned out was
     incomplete, and its incompleteness is tracked as CVE-2021-28950.
   - CVE-2021-29154: Fixed an incorrect computation of branch displacements
     in the BPF JIT compilers, which could allow to execute arbitrary code
     within the kernel context. (bsc#1184391)
   - CVE-2021-3444: The bpf verifier did not properly handle mod32
     destination register truncation when the source register was known to be
     0. A local attacker with the ability to load bpf programs could use this
     gain out-of-bounds reads in kernel memory leading to information
     disclosure (kernel memory), and possibly out-of-bounds writes that could
     potentially lead to code execution. (bsc#1184170)
   - CVE-2021-28660: Fixed an out-of-bounds write in rtw_wx_set_scan which
     could lead to local escalation of privilege with no additional execution
     privileges needed. (bsc#1183593)
   - CVE-2021-27365: Fixed an issue in certain iSCSI data structures that do
     not have appropriate length constraints or checks, and can exceed the
     PAGE_SIZE value. (bsc#1182715)
   - CVE-2021-28688: Fixed some uninitialization pointers in Xen that could
     result in leaking persistent grants. The leak in turn would prevent
     fully cleaning up after a respective guest has died, leaving around
     zombie domains. (bsc#1183646)
   - CVE-2021-27363: Fixed a kernel pointer leak that can be used to
     determine the address of the iscsi_transport structure. (bsc#1182716)
   - CVE-2021-27364: Fixed an issue that provides an unprivileged user the
     ability of craft Netlink messages. (bsc#1182717)

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 Module for Live Patching 15-SP2:

      zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP2-2021-2577=1

Package List:

   - SUSE Linux Enterprise Module for Live Patching 15-SP2 (ppc64le s390x x86_64):



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