Issued:
2022-05-10
Updated:
2022-05-10

RHSA-2022:1975 - 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: fget: check that the fd still exists after getting a ref to it (CVE-2021-4083)

  • kernel: avoid cyclic entity chains due to malformed USB descriptors (CVE-2020-0404)

  • kernel: integer overflow in k_ascii() in drivers/tty/vt/keyboard.c (CVE-2020-13974)

  • kernel: out-of-bounds read in bpf_skb_change_head() of filter.c due to a use-after-free (CVE-2021-0941)

  • kernel: joydev: zero size passed to joydev_handle_JSIOCSBTNMAP() (CVE-2021-3612)

  • kernel: reading /proc/sysvipc/shm does not scale with large shared memory segment counts (CVE-2021-3669)

  • kernel: out-of-bound Read in qrtr_endpoint_post in net/qrtr/qrtr.c (CVE-2021-3743)

  • kernel: crypto: ccp - fix resource leaks in ccp_run_aes_gcm_cmd() (CVE-2021-3744)

  • kernel: possible use-after-free in bluetooth module (CVE-2021-3752)

  • kernel: unaccounted ipc objects in Linux kernel lead to breaking memcg limits and DoS attacks (CVE-2021-3759)

  • kernel: DoS in ccp_run_aes_gcm_cmd() function (CVE-2021-3764)

  • kernel: sctp: Invalid chunks may be used to remotely remove existing associations (CVE-2021-3772)

  • kernel: lack of port sanity checking in natd and netfilter leads to exploit of OpenVPN clients (CVE-2021-3773)

  • kernel: possible leak or coruption of data residing on hugetlbfs (CVE-2021-4002)

  • kernel: security regression for CVE-2018-13405 (CVE-2021-4037)

  • kernel: Buffer overwrite in decode_nfs_fh function (CVE-2021-4157)

  • kernel: cgroup: Use open-time creds and namespace for migration perm checks (CVE-2021-4197)

  • kernel: Race condition in races in sk_peer_pid and sk_peer_cred accesses (CVE-2021-4203)

  • kernel: new DNS Cache Poisoning Attack based on ICMP fragment needed packets replies (CVE-2021-20322)

  • hw: cpu: LFENCE/JMP Mitigation Update for CVE-2017-5715 (CVE-2021-26401)

  • kernel: Local privilege escalation due to incorrect BPF JIT branch displacement computation (CVE-2021-29154)

  • kernel: use-after-free in hso_free_net_device() in drivers/net/usb/hso.c (CVE-2021-37159)

  • kernel: eBPF multiplication integer overflow in prealloc_elems_and_freelist() in kernel/bpf/stackmap.c leads to out-of-bounds write (CVE-2021-41864)

  • kernel: Heap buffer overflow in firedtv driver (CVE-2021-42739)

  • kernel: an array-index-out-bounds in detach_capi_ctr in drivers/isdn/capi/kcapi.c (CVE-2021-43389)

  • kernel: mwifiex_usb_recv() in drivers/net/wireless/marvell/mwifiex/usb.c allows an attacker to cause DoS via crafted USB device (CVE-2021-43976)

  • kernel: use-after-free in the TEE subsystem (CVE-2021-44733)

  • kernel: information leak in the IPv6 implementation (CVE-2021-45485)

  • kernel: information leak in the IPv4 implementation (CVE-2021-45486)

  • hw: cpu: intel: Branch History Injection (BHI) (CVE-2022-0001)

  • hw: cpu: intel: Intra-Mode BTI (CVE-2022-0002)

  • kernel: Local denial of service in bond_ipsec_add_sa (CVE-2022-0286)

  • kernel: DoS in sctp_addto_chunk in net/sctp/sm_make_chunk.c (CVE-2022-0322)

  • kernel: FUSE allows UAF reads of write() buffers, allowing theft of (partial) /etc/shadow hashes (CVE-2022-1011)

  • kernel: use-after-free in nouveau kernel module (CVE-2020-27820)

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 8.6 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 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 - Telecommunications Update Service8.8x86_64
Red Hat Enterprise Linux for Real Time - Telecommunications Update Service8.6x86_64

Updated Packages

  • kernel-rt-devel-4.18.0-372.9.1.rt7.166.el8.x86_64.rpm
  • kernel-rt-4.18.0-372.9.1.rt7.166.el8.src.rpm
  • kernel-rt-debug-devel-4.18.0-372.9.1.rt7.166.el8.x86_64.rpm
  • kernel-rt-modules-4.18.0-372.9.1.rt7.166.el8.x86_64.rpm
  • kernel-rt-modules-extra-4.18.0-372.9.1.rt7.166.el8.x86_64.rpm
  • kernel-rt-debug-modules-extra-4.18.0-372.9.1.rt7.166.el8.x86_64.rpm
  • kernel-rt-kvm-4.18.0-372.9.1.rt7.166.el8.x86_64.rpm
  • kernel-rt-core-4.18.0-372.9.1.rt7.166.el8.x86_64.rpm
  • kernel-rt-debug-debuginfo-4.18.0-372.9.1.rt7.166.el8.x86_64.rpm
  • kernel-rt-debug-kvm-4.18.0-372.9.1.rt7.166.el8.x86_64.rpm
  • kernel-rt-debug-4.18.0-372.9.1.rt7.166.el8.x86_64.rpm
  • kernel-rt-4.18.0-372.9.1.rt7.166.el8.x86_64.rpm
  • kernel-rt-debug-core-4.18.0-372.9.1.rt7.166.el8.x86_64.rpm
  • kernel-rt-debug-modules-4.18.0-372.9.1.rt7.166.el8.x86_64.rpm
  • kernel-rt-debuginfo-4.18.0-372.9.1.rt7.166.el8.x86_64.rpm
  • kernel-rt-debuginfo-common-x86_64-4.18.0-372.9.1.rt7.166.el8.x86_64.rpm

Fixes

CVEs

References

Additional information