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SUSE: 2021:2538-1 Important: Linux Kernel Patch Addresses Three Issues

suse
Calendar Grey July 27, 2021
Dist Suse Esm H88
Shielding SUSE Linux Kernel: Crucial patch resolves three critical vulnerabilities posing a major risk. Discover more!
An update that fixes three vulnerabilities is now available

Summary

This update for the Linux Kernel 4.4.180-94_135 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. (bsc#1188116) - 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. (bnc#1187050) 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 for SAP 12-SP3:

Topics%20covered

Topics Covered

security advisory local privilege escalation kernel patch important out-of-bounds write root privilege

References

#1187052 #1188117 #1188257

Cross- CVE-2020-36385 CVE-2021-22555 CVE-2021-33909

CVSS scores:

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-2021-33909 (SUSE): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Products:

SUSE Linux Enterprise Server for SAP 12-SP3

SUSE Linux Enterprise Server 12-SP3-LTSS

SUSE Linux Enterprise Module for Live Patching 15-SP2

SUSE Linux Enterprise Module for Live Patching 15-SP1

SUSE Linux Enterprise Module for Live Patching 15

SUSE Linux Enterprise Live Patching 12-SP5

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2021:2538-1
Rating: important

Topics%20covered

Topics Covered

security advisory local privilege escalation kernel patch important out-of-bounds write root privilege

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