Issued:
2021-05-18
Updated:
2021-05-18

RHSA-2021:1739 - Important: kernel-rt security and bug fix update

Synopsis

Important: kernel-rt security and bug fix update

Type/Severity

Security Advisory Important

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.

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.

Description

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: Integer overflow in Intel(R) Graphics Drivers (CVE-2020-12362)

  • kernel: use-after-free caused by a malicious USB device in the drivers/usb/misc/adutux.c driver (CVE-2019-19523)

  • kernel: use-after-free bug caused by a malicious USB device in the drivers/usb/misc/iowarrior.c driver (CVE-2019-19528)

  • kernel: possible out of bounds write in kbd_keycode of keyboard.c (CVE-2020-0431)

  • kernel: DoS by corrupting mountpoint reference counter (CVE-2020-12114)

  • kernel: use-after-free in usb_sg_cancel function in drivers/usb/core/message.c (CVE-2020-12464)

  • kernel: buffer uses out of index in ext3/4 filesystem (CVE-2020-14314)

  • kernel: Use After Free vulnerability in cgroup BPF component (CVE-2020-14356)

  • kernel: NULL pointer dereference in serial8250_isa_init_ports function in drivers/tty/serial/8250/8250_core.c (CVE-2020-15437)

  • kernel: umask not applied on filesystem without ACL support (CVE-2020-24394)

  • kernel: TOCTOU mismatch in the NFS client code (CVE-2020-25212)

  • kernel: incomplete permission checking for access to rbd devices (CVE-2020-25284)

  • kernel: race condition between hugetlb sysctl handlers in mm/hugetlb.c (CVE-2020-25285)

  • kernel: improper input validation in ppp_cp_parse_cr function leads to memory corruption and read overflow (CVE-2020-25643)

  • kernel: perf_event_parse_addr_filter memory (CVE-2020-25704)

  • kernel: use-after-free in kernel midi subsystem (CVE-2020-27786)

  • kernel: child process is able to access parent mm through hfi dev file handle (CVE-2020-27835)

  • kernel: slab-out-of-bounds read in fbcon (CVE-2020-28974)

  • kernel: fork: fix copy_process(CLONE_PARENT) race with the exiting ->real_parent (CVE-2020-35508)

  • kernel: use after free in tun_get_user of tun.c could lead to local escalation of privilege (CVE-2021-0342)

  • kernel: NULL pointer dereferences in ov511_mode_init_regs and ov518_mode_init_regs in drivers/media/usb/gspca/ov519.c (CVE-2020-11608)

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.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.4 Release Notes linked from the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension8.8x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension8.6x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension8.4x86_64
Red Hat Enterprise Linux for x86_64 - Extended Life Cycle8.10x86_64
Red Hat Enterprise Linux for Real Time8x86_64
Red Hat Enterprise Linux for Real Time for NFV8x86_64
Red Hat Enterprise Linux for Real Time for NFV - Telecommunications Update Service8.8x86_64
Red Hat Enterprise Linux for Real Time for NFV - Telecommunications Update Service8.6x86_64
Red Hat Enterprise Linux for Real Time for NFV - Telecommunications Update Service8.4x86_64
Red Hat Enterprise Linux for Real Time - Telecommunications Update Service8.8x86_64
Red Hat Enterprise Linux for Real Time - Telecommunications Update Service8.6x86_64
Red Hat Enterprise Linux for Real Time - Telecommunications Update Service8.4x86_64

Updated Packages

  • kernel-rt-devel-4.18.0-305.rt7.72.el8.x86_64.rpm
  • kernel-rt-4.18.0-305.rt7.72.el8.x86_64.rpm
  • kernel-rt-debug-modules-4.18.0-305.rt7.72.el8.x86_64.rpm
  • kernel-rt-core-4.18.0-305.rt7.72.el8.x86_64.rpm
  • kernel-rt-debug-modules-extra-4.18.0-305.rt7.72.el8.x86_64.rpm
  • kernel-rt-debug-4.18.0-305.rt7.72.el8.x86_64.rpm
  • kernel-rt-modules-extra-4.18.0-305.rt7.72.el8.x86_64.rpm
  • kernel-rt-debug-debuginfo-4.18.0-305.rt7.72.el8.x86_64.rpm
  • kernel-rt-kvm-4.18.0-305.rt7.72.el8.x86_64.rpm
  • kernel-rt-debug-devel-4.18.0-305.rt7.72.el8.x86_64.rpm
  • kernel-rt-debuginfo-4.18.0-305.rt7.72.el8.x86_64.rpm
  • kernel-rt-debug-core-4.18.0-305.rt7.72.el8.x86_64.rpm
  • kernel-rt-4.18.0-305.rt7.72.el8.src.rpm
  • kernel-rt-debug-kvm-4.18.0-305.rt7.72.el8.x86_64.rpm
  • kernel-rt-modules-4.18.0-305.rt7.72.el8.x86_64.rpm
  • kernel-rt-debuginfo-common-x86_64-4.18.0-305.rt7.72.el8.x86_64.rpm

Fixes

CVEs

References

Additional information