RHSA-2021:0857: Red Hat Security Advisory: kernel-rt security and bug fix update

An update for kernel-rt is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix(es):

• kernel: Local buffer overflow in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c (CVE-2020-25211)
• kernel: SCSI target (LIO) write to any block on ILO backstore (CVE-2020-28374)
• kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free (CVE-2020-29661)
• kernel: malicious USB devices can lead to multiple out-of-bounds write (CVE-2019-19532)
• kernel: out-of-bounds reads in pinctrl subsystem. (CVE-2020-0427)
• kernel: use-after-free in i915_ppgtt_close in drivers/gpu/drm/i915/i915_gem_gtt.c (CVE-2020-7053)
• kernel: performance counters race condition use-after-free (CVE-2020-14351)
• kernel: Geneve/IPsec traffic may be unencrypted between two Geneve endpoints (CVE-2020-25645)
• kernel: use-after-free in read in vt_do_kdgkb_ioctl (CVE-2020-25656)
• kernel: ICMP rate limiting can be used for DNS poisoning attack (CVE-2020-25705)
• kernel: increase slab leak leads to DoS (CVE-2021-20265) 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. Bug Fix(es):
• kernel-rt: update to the latest RHEL7.9.z4 source tree (BZ#1917909) Related CVEs:
• CVE-2019-19532: kernel: malicious USB devices can lead to multiple out-of-bounds write
• CVE-2020-0427: kernel: out-of-bounds reads in pinctrl subsystem.
• CVE-2020-7053: kernel: use-after-free in i915_ppgtt_close in drivers/gpu/drm/i915/i915_gem_gtt.c
• CVE-2020-14351: kernel: performance counters race condition use-after-free
• CVE-2020-25211: kernel: Local buffer overflow in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c
• CVE-2020-25645: kernel: Geneve/IPsec traffic may be unencrypted between two Geneve endpoints
• CVE-2020-25656: kernel: use-after-free in read in vt_do_kdgkb_ioctl
• CVE-2020-25705: kernel: ICMP rate limiting can be used for DNS poisoning attack
• CVE-2020-28374: kernel: SCSI target (LIO) write to any block on ILO backstore
• CVE-2020-29661: kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free
• CVE-2021-20265: kernel: increase slab leak leads to DoS