RHSA-2021:0857: Important: kernel-rt security and bug fix update
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: Local buffer overflow in ctnetlinkparsetuplefilter in net/netfilter/nfconntracknetlink.c (CVE-2020-25211)</li> <li> kernel: SCSI target (LIO) write to any block on ILO backstore (CVE-2020-28374)</li> <li> kernel: locking issue in drivers/tty/ttyjobctrl.c can lead to an use-after-free (CVE-2020-29661)</li> <li> kernel: malicious USB devices can lead to multiple out-of-bounds write (CVE-2019-19532)</li> <li> kernel: out-of-bounds reads in pinctrl subsystem. (CVE-2020-0427)</li> <li> kernel: use-after-free in i915ppgttclose in drivers/gpu/drm/i915/i915gemgtt.c (CVE-2020-7053)</li> <li> kernel: performance counters race condition use-after-free (CVE-2020-14351)</li> <li> kernel: Geneve/IPsec traffic may be unencrypted between two Geneve endpoints (CVE-2020-25645)</li> <li> kernel: use-after-free in read in vtdokdgkbioctl (CVE-2020-25656)</li> <li> kernel: ICMP rate limiting can be used for DNS poisoning attack (CVE-2020-25705)</li> <li> kernel: increase slab leak leads to DoS (CVE-2021-20265)</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 to the latest RHEL7.9.z4 source tree (BZ#1917909)</li>
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of RHSA-2021:0857?
The severity of RHSA-2021:0857 is classified as important due to the local buffer overflow vulnerability.
What component is affected by RHSA-2021:0857?
RHSA-2021:0857 affects the kernel-rt packages specifically related to the Real Time Linux Kernel.
How do I fix RHSA-2021:0857?
To fix RHSA-2021:0857, update the kernel-rt packages to version 3.10.0-1160.21.1.rt56.1158.el7.
What is the primary vulnerability identified in RHSA-2021:0857?
The primary vulnerability identified in RHSA-2021:0857 is a local buffer overflow in ctnetlink_parse_tuple_filter.
What does the kernel-rt package provide as mentioned in RHSA-2021:0857?
The kernel-rt package provides a Real Time Linux Kernel that is optimized for systems requiring high determinism.