Issued:
2023-08-08
Updated:
2023-08-08

RHSA-2023:4541 - 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: use-after-free in l2cap_connect and l2cap_le_connect_req in net/bluetooth/l2cap_core.c (CVE-2022-42896)

  • kernel: tcindex: use-after-free vulnerability in traffic control index filter allows privilege escalation (CVE-2023-1281)

  • kernel: Use-after-free vulnerability in the Linux Kernel traffic control index filter (CVE-2023-1829)

  • kernel: use-after-free vulnerability in the perf_group_detach function of the Linux Kernel Performance Events (CVE-2023-2235)

  • kernel: OOB access in the Linux kernel's XFS subsystem (CVE-2023-2124)

  • kernel: i2c: out-of-bounds write in xgene_slimpro_i2c_xfer() (CVE-2023-2194)

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):

  • Addding the building of i915 driver to 8.8 (BZ#2208276)

  • kernel-rt: update RT source tree to the RHEL-8.8.z2 source tree (BZ#2215026)

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 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 - Telecommunications Update Service8.8x86_64

Updated Packages

  • kernel-rt-core-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm
  • kernel-rt-debug-kvm-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm
  • kernel-rt-debug-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm
  • kernel-rt-modules-extra-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm
  • kernel-rt-debug-core-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm
  • kernel-rt-debuginfo-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm
  • kernel-rt-debug-modules-extra-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm
  • kernel-rt-devel-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm
  • kernel-rt-debuginfo-common-x86_64-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm
  • kernel-rt-modules-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm
  • kernel-rt-debug-debuginfo-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm
  • kernel-rt-4.18.0-477.21.1.rt7.284.el8_8.src.rpm
  • kernel-rt-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm
  • kernel-rt-debug-modules-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm
  • kernel-rt-kvm-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm
  • kernel-rt-debug-devel-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm

Fixes

CVEs

References

Additional information