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SUSE: 2021:0809-1 Important: Kernel Live Patch Addressing Key Threats

suse
Calendar Grey March 17, 2021
Dist Suse Esm H88
Debian Security Update addresses several vulnerabilities in the kernel, tackling potential memory leaks and privilege escalation risks.
An update that fixes four vulnerabilities is now available

Summary

This update for the Linux Kernel 4.12.14-122_57 fixes several issues. The following security issues were fixed: - CVE-2020-29368: Fixed an issue in copy-on-write implementation which could have granted unintended write access because of a race condition in a THP mapcount check (bsc#1179664). - CVE-2021-3347: Fixed a use-after-free in the PI futexes during fault handling, allowing local users to execute code in the kernel (bsc#1181553). - CVE-2020-27786: Fixed a potential user after free which could have led to memory corruption or privilege escalation (bsc#1179616). - CVE-2021-0342: Fixed a potential memory corruption due to a use after free which could have led to local escalation of privilege with System execution privileges required (bsc#1180859). Patch Instructions:

Topics%20covered

Topics Covered

security advisory memory corruption kernel patch important SUSE local escalation use-after-free

References

#1179616 #1179664 #1180859 #1181553

Cross- CVE-2020-27786 CVE-2020-29368 CVE-2021-0342

CVE-2021-3347

CVSS scores:

CVE-2020-27786 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE-2020-27786 (SUSE): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE-2020-29368 (NVD) : 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE-2020-29368 (SUSE): 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE-2021-0342 (NVD) : 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVE-2021-0342 (SUSE): 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE-2021-3347 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE-2021-3347 (SUSE): 8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Products:

SUSE Linux Enterprise Module for Live Patching 15-SP1

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2021:0809-1
Rating: important

Topics%20covered

Topics Covered

security advisory memory corruption kernel patch important SUSE local escalation use-after-free

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