RHSA-2021:2316: Important: kernel-rt security and bug fix update

First published: Tue Jun 08 2021(Updated: )

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.<br>Security Fix(es):<br><li> kernel: Integer overflow in Intel(R) Graphics Drivers (CVE-2020-12362)</li> <li> kernel: Use after free via PI futex state (CVE-2021-3347)</li> <li> kernel: use-after-free in n_tty_receive_buf_common function in drivers/tty/n_tty.c (CVE-2020-8648)</li> <li> kernel: Improper input validation in some Intel(R) Graphics Drivers (CVE-2020-12363)</li> <li> kernel: Null pointer dereference in some Intel(R) Graphics Drivers (CVE-2020-12364)</li> <li> kernel: Speculation on pointer arithmetic against bpf_context pointer (CVE-2020-27170)</li> For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.<br>Bug Fix(es):<br><li> lru-add-drain workqueue on RT is allocated without being used (BZ#1894587)</li> <li> kernel-rt: update to the latest RHEL7.9.z source tree (BZ#1953118)</li>

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