CWE
362
Advisory Published

RHSA-2021:3088: Important: kernel-rt security and bug fix update

First published: Tue Aug 10 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: race condition in net/can/bcm.c leads to local privilege escalation (CVE-2021-3609)</li> <li> kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks (CVE-2021-22543)</li> <li> kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c (CVE-2021-22555)</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> kernel-rt: update RT source tree to the RHEL-8.4.z source tree (BZ#1985050)</li> <li> kernel-rt: Merge mm/memcg: Fix kmem_cache_alloc() performance regression (BZ#1987102)</li>

Affected SoftwareAffected VersionHow to fix
redhat/kernel-rt<4.18.0-305.12.1.rt7.84.el8_4
4.18.0-305.12.1.rt7.84.el8_4
redhat/kernel-rt<4.18.0-305.12.1.rt7.84.el8_4
4.18.0-305.12.1.rt7.84.el8_4
redhat/kernel-rt-core<4.18.0-305.12.1.rt7.84.el8_4
4.18.0-305.12.1.rt7.84.el8_4
redhat/kernel-rt-debug<4.18.0-305.12.1.rt7.84.el8_4
4.18.0-305.12.1.rt7.84.el8_4
redhat/kernel-rt-debug-core<4.18.0-305.12.1.rt7.84.el8_4
4.18.0-305.12.1.rt7.84.el8_4
redhat/kernel-rt-debug-debuginfo<4.18.0-305.12.1.rt7.84.el8_4
4.18.0-305.12.1.rt7.84.el8_4
redhat/kernel-rt-debug-devel<4.18.0-305.12.1.rt7.84.el8_4
4.18.0-305.12.1.rt7.84.el8_4
redhat/kernel-rt-debug-modules<4.18.0-305.12.1.rt7.84.el8_4
4.18.0-305.12.1.rt7.84.el8_4
redhat/kernel-rt-debug-modules-extra<4.18.0-305.12.1.rt7.84.el8_4
4.18.0-305.12.1.rt7.84.el8_4
redhat/kernel-rt-debuginfo<4.18.0-305.12.1.rt7.84.el8_4
4.18.0-305.12.1.rt7.84.el8_4
redhat/kernel-rt-devel<4.18.0-305.12.1.rt7.84.el8_4
4.18.0-305.12.1.rt7.84.el8_4
redhat/kernel-rt-modules<4.18.0-305.12.1.rt7.84.el8_4
4.18.0-305.12.1.rt7.84.el8_4
redhat/kernel-rt-modules-extra<4.18.0-305.12.1.rt7.84.el8_4
4.18.0-305.12.1.rt7.84.el8_4
redhat/kernel-rt-debug-kvm<4.18.0-305.12.1.rt7.84.el8_4
4.18.0-305.12.1.rt7.84.el8_4
redhat/kernel-rt-kvm<4.18.0-305.12.1.rt7.84.el8_4
4.18.0-305.12.1.rt7.84.el8_4

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