RHSA-2021:3375: Important: kernel-rt security and bug fix update
First published: Tue Aug 31 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> <li> kernel: race condition for removal of the HCI controller (CVE-2021-32399)</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 latest RHEL-8.2.z11 Batch source tree (BZ#1984586)</li>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <4.18.0-193.64.1.rt13.115.el8_2 | 4.18.0-193.64.1.rt13.115.el8_2 |
| redhat/kernel-rt | <4.18.0-193.64.1.rt13.115.el8_2 | 4.18.0-193.64.1.rt13.115.el8_2 |
| redhat/kernel-rt-core | <4.18.0-193.64.1.rt13.115.el8_2 | 4.18.0-193.64.1.rt13.115.el8_2 |
| redhat/kernel-rt-debug | <4.18.0-193.64.1.rt13.115.el8_2 | 4.18.0-193.64.1.rt13.115.el8_2 |
| redhat/kernel-rt-debug-core | <4.18.0-193.64.1.rt13.115.el8_2 | 4.18.0-193.64.1.rt13.115.el8_2 |
| redhat/kernel-rt-debug-debuginfo | <4.18.0-193.64.1.rt13.115.el8_2 | 4.18.0-193.64.1.rt13.115.el8_2 |
| redhat/kernel-rt-debug-devel | <4.18.0-193.64.1.rt13.115.el8_2 | 4.18.0-193.64.1.rt13.115.el8_2 |
| redhat/kernel-rt-debug-modules | <4.18.0-193.64.1.rt13.115.el8_2 | 4.18.0-193.64.1.rt13.115.el8_2 |
| redhat/kernel-rt-debug-modules-extra | <4.18.0-193.64.1.rt13.115.el8_2 | 4.18.0-193.64.1.rt13.115.el8_2 |
| redhat/kernel-rt-debuginfo | <4.18.0-193.64.1.rt13.115.el8_2 | 4.18.0-193.64.1.rt13.115.el8_2 |
| redhat/kernel-rt-devel | <4.18.0-193.64.1.rt13.115.el8_2 | 4.18.0-193.64.1.rt13.115.el8_2 |
| redhat/kernel-rt-modules | <4.18.0-193.64.1.rt13.115.el8_2 | 4.18.0-193.64.1.rt13.115.el8_2 |
| redhat/kernel-rt-modules-extra | <4.18.0-193.64.1.rt13.115.el8_2 | 4.18.0-193.64.1.rt13.115.el8_2 |
| redhat/kernel-rt-debug-kvm | <4.18.0-193.64.1.rt13.115.el8_2 | 4.18.0-193.64.1.rt13.115.el8_2 |
| redhat/kernel-rt-kvm | <4.18.0-193.64.1.rt13.115.el8_2 | 4.18.0-193.64.1.rt13.115.el8_2 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1965461
- https://bugzilla.redhat.com/show_bug.cgi?id=1970807
- https://bugzilla.redhat.com/show_bug.cgi?id=1971651
- https://bugzilla.redhat.com/show_bug.cgi?id=1980101
- https://access.redhat.com/security/updates/classification/#important
- https://access.redhat.com/errata/RHSA-2021:3375 (Advisory)
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