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SUSE Linux: 2021:2644-1 Important: Kernel Memory Corruption Fix

suse
Calendar Grey August 10, 2021
Dist Suse Esm H88
SUSE has released a security update for the Linux Kernel addressing 5 vulnerabilities and incorporating 25 significant corrections. A system restart is advised post-installation.
An update that solves 5 vulnerabilities and has 25 fixes is now available

Summary

The SUSE Linux Enterprise 12 SP5 Azure kernel was updated to receive various security and bugfixes. The following security bugs were fixed: - CVE-2021-3659: Fixed a NULL pointer dereference in llsec_key_alloc() in net/mac802154/llsec.c (bsc#1188876). - CVE-2021-22543: Fixed improper handling of VM_IO|VM_PFNMAP vmas in KVM, which could bypass RO checks and can lead to pages being freed while still accessible by the VMM and guest. This allowed users with the ability to start and control a VM to read/write random pages of memory and can result in local privilege escalation (bsc#1186482). - CVE-2021-37576: Fixed an issue on the powerpc platform, where a KVM guest OS user could cause host OS memory corruption via rtas_args.nargs (bsc#1188838). - CVE-2020-0429: In l2tp_session_delete and related functions of

Topics%20covered

Topics Covered

security advisory privilege escalation memory corruption important kernel SUSE Linux threat fix

References

#1065729 #1085224 #1094840 #1113295 #1176724

#1176931 #1176940 #1179195 #1181161 #1183871

#1184114 #1184350 #1184804 #1185377 #1186206

#1186482 #1186483 #1186672 #1187038 #1187476

#1187846 #1188026 #1188101 #1188405 #1188620

#1188750 #1188838 #1188876 #1188885 #1188973

Cross- CVE-2020-0429 CVE-2020-36386 CVE-2021-22543

CVE-2021-3659 CVE-2021-37576

CVSS scores:

CVE-2020-0429 (NVD) : 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVE-2020-0429 (SUSE): 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE-2020-36386 (NVD) : 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CVE-2020-36386 (SUSE): 5.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

CVE-2021-22543 (SUSE): 8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity
important
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Announcement ID: SUSE-SU-2021:2644-1
Rating: important

Topics%20covered

Topics Covered

security advisory privilege escalation memory corruption important kernel SUSE Linux threat fix

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