SUSE-SU-2021:0809-1

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SUSE-SU-2021:0809-1

Summary: Security update for the Linux Kernel (Live Patch 21 for SLE 15 SP1)

Details: This update for the Linux Kernel 4.12.14-197_78 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).

References: https://www.suse.com/support/update/announcement/2021/suse-su-20210809-1/, https://bugzilla.suse.com/1179616, https://bugzilla.suse.com/1179664, https://bugzilla.suse.com/1180859, https://bugzilla.suse.com/1181553, https://www.suse.com/security/cve/CVE-2020-27786, https://www.suse.com/security/cve/CVE-2020-29368, https://www.suse.com/security/cve/CVE-2021-0342, https://www.suse.com/security/cve/CVE-2021-3347