RHSA-2021:0774: Important: kernel-rt security and bug fix update
First published: Tue Mar 09 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: bad kfree in auditfilter.c may lead to escalation of privilege (CVE-2020-0444)</li> <li> kernel: Local buffer overflow in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c (CVE-2020-25211)</li> <li> kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free (CVE-2020-29661)</li> <li> kernel: performance counters race condition use-after-free (CVE-2020-14351)</li> <li> kernel: ICMP rate limiting can be used for DNS poisoning attack (CVE-2020-25705)</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.z7 Batch source tree (BZ#1915947)</li> <li> kernel-rt possible livelock: WARNING: CPU: 28 PID: 3109 at kernel/ptrace.c:242 ptrace_check_attach+0xdd/0x1a0 (BZ#1925309)</li>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <4.18.0-193.46.1.rt13.96.el8_2 | 4.18.0-193.46.1.rt13.96.el8_2 |
| redhat/kernel-rt | <4.18.0-193.46.1.rt13.96.el8_2 | 4.18.0-193.46.1.rt13.96.el8_2 |
| redhat/kernel-rt-core | <4.18.0-193.46.1.rt13.96.el8_2 | 4.18.0-193.46.1.rt13.96.el8_2 |
| redhat/kernel-rt-debug | <4.18.0-193.46.1.rt13.96.el8_2 | 4.18.0-193.46.1.rt13.96.el8_2 |
| redhat/kernel-rt-debug-core | <4.18.0-193.46.1.rt13.96.el8_2 | 4.18.0-193.46.1.rt13.96.el8_2 |
| redhat/kernel-rt-debug-debuginfo | <4.18.0-193.46.1.rt13.96.el8_2 | 4.18.0-193.46.1.rt13.96.el8_2 |
| redhat/kernel-rt-debug-devel | <4.18.0-193.46.1.rt13.96.el8_2 | 4.18.0-193.46.1.rt13.96.el8_2 |
| redhat/kernel-rt-debug-modules | <4.18.0-193.46.1.rt13.96.el8_2 | 4.18.0-193.46.1.rt13.96.el8_2 |
| redhat/kernel-rt-debug-modules-extra | <4.18.0-193.46.1.rt13.96.el8_2 | 4.18.0-193.46.1.rt13.96.el8_2 |
| redhat/kernel-rt-debuginfo | <4.18.0-193.46.1.rt13.96.el8_2 | 4.18.0-193.46.1.rt13.96.el8_2 |
| redhat/kernel-rt-devel | <4.18.0-193.46.1.rt13.96.el8_2 | 4.18.0-193.46.1.rt13.96.el8_2 |
| redhat/kernel-rt-modules | <4.18.0-193.46.1.rt13.96.el8_2 | 4.18.0-193.46.1.rt13.96.el8_2 |
| redhat/kernel-rt-modules-extra | <4.18.0-193.46.1.rt13.96.el8_2 | 4.18.0-193.46.1.rt13.96.el8_2 |
| redhat/kernel-rt-debug-kvm | <4.18.0-193.46.1.rt13.96.el8_2 | 4.18.0-193.46.1.rt13.96.el8_2 |
| redhat/kernel-rt-kvm | <4.18.0-193.46.1.rt13.96.el8_2 | 4.18.0-193.46.1.rt13.96.el8_2 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1862849
- https://bugzilla.redhat.com/show_bug.cgi?id=1877571
- https://bugzilla.redhat.com/show_bug.cgi?id=1894579
- https://bugzilla.redhat.com/show_bug.cgi?id=1906525
- https://bugzilla.redhat.com/show_bug.cgi?id=1915947
- https://bugzilla.redhat.com/show_bug.cgi?id=1920474
- https://access.redhat.com/security/updates/classification/#important
- https://access.redhat.com/errata/RHSA-2021:0774 (Advisory)
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- anchor-id/RHSA-2021:0774
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