Issued:
2020-04-28
Updated:
2020-04-28

RHSA-2020:1567 - Important: kernel-rt security, bug fix, and enhancement update

Synopsis

Important: kernel-rt security, bug fix, and enhancement 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: use-after-free in __blk_add_trace in kernel/trace/blktrace.c (CVE-2019-19768)

  • kernel: nfs: NULL pointer dereference due to an anomalized NFS message sequence (CVE-2018-16871)

  • kernel: memory leak in the kernel_read_file function in fs/exec.c allows to cause a denial of service (CVE-2019-8980)

  • kernel: unprivileged users able to create RAW sockets in AF_IEEE802154 network protocol. (CVE-2019-17053)

  • kernel: unprivileged users able to create RAW sockets in AF_ISDN network protocol. (CVE-2019-17055)

  • kernel: integer overflow in tcp_ack_update_rtt in net/ipv4/tcp_input.c (CVE-2019-18805)

  • kernel: information leak bug caused by a malicious USB device in the drivers/net/can/usb/peak_usb/pcan_usb_core.c driver (CVE-2019-19534)

  • kernel: some ipv6 protocols not encrypted over ipsec tunnel. (CVE-2020-1749)

  • Kernel: net: using kernel space address bits to derive IP ID may potentially break KASLR (CVE-2019-10639)

  • kernel: An out-of-bounds read in drivers/scsi/qedi/qedi_dbg.c leading to crash or information disclosure (CVE-2019-15090)

  • kernel: a NULL pointer dereference in drivers/net/wireless/ath/ath10k/usb.c leads to a crash (CVE-2019-15099)

  • kernel: Null pointer dereference in the sound/usb/line6/pcm.c (CVE-2019-15221)

  • kernel: Two memory leaks in the mwifiex_pcie_init_evt_ring() function in drivers/net/wireless/marvell/mwifiex/pcie.c allows for a DoS (CVE-2019-19057)

  • kernel: Memory leaks in drivers/net/wireless/ath/ath9k/htc_hst.c in the Linux kernel (DOS) (CVE-2019-19073)

  • kernel: a memory leak in the ath9k management function in allows local DoS (CVE-2019-19074)

  • kernel: when cpu.cfs_quota_us is used allows attackers to cause a denial of service against non-cpu-bound applications (CVE-2019-19922)

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):

  • RT: update RT source tree to the RHEL-8.2 tree (BZ#1708716)

  • KVM-RT guest fails boot with emulatorsched (BZ#1712781)

  • 8 vCPU guest need max latency < 20 us with stress [RT-8.2] (BZ#1757165)

  • Request nx_huge_pages=N as default value to avoid kvm-rt guest large latency spike [rt-8] (BZ#1788352)

  • RT: Add rpm Provide of 'kernel' to indicate that this is a kernel package (BZ#1796284)

  • [RHEL8] RT kernel signed by test certificate and not Red Hat Secure Boot (BZ#1806871)

Enhancement(s):

  • update to the upstream 5.x RT patchset (BZ#1680161)

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 for NFV - Telecommunications Update Service8.2x86_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
Red Hat Enterprise Linux for Real Time - Telecommunications Update Service8.2x86_64

Updated Packages

  • kernel-rt-devel-4.18.0-193.rt13.51.el8.x86_64.rpm
  • kernel-rt-debug-modules-4.18.0-193.rt13.51.el8.x86_64.rpm
  • kernel-rt-debuginfo-4.18.0-193.rt13.51.el8.x86_64.rpm
  • kernel-rt-4.18.0-193.rt13.51.el8.src.rpm
  • kernel-rt-kvm-4.18.0-193.rt13.51.el8.x86_64.rpm
  • kernel-rt-debug-kvm-4.18.0-193.rt13.51.el8.x86_64.rpm
  • kernel-rt-modules-extra-4.18.0-193.rt13.51.el8.x86_64.rpm
  • kernel-rt-debug-core-4.18.0-193.rt13.51.el8.x86_64.rpm
  • kernel-rt-4.18.0-193.rt13.51.el8.x86_64.rpm
  • kernel-rt-debug-4.18.0-193.rt13.51.el8.x86_64.rpm
  • kernel-rt-debuginfo-common-x86_64-4.18.0-193.rt13.51.el8.x86_64.rpm
  • kernel-rt-core-4.18.0-193.rt13.51.el8.x86_64.rpm
  • kernel-rt-debug-modules-extra-4.18.0-193.rt13.51.el8.x86_64.rpm
  • kernel-rt-debug-devel-4.18.0-193.rt13.51.el8.x86_64.rpm
  • kernel-rt-modules-4.18.0-193.rt13.51.el8.x86_64.rpm
  • kernel-rt-debug-debuginfo-4.18.0-193.rt13.51.el8.x86_64.rpm

Fixes

CVEs

References

Additional information