[RHSA-2023:4138-01] Important: kernel-rt security and bug fix update

Tue Jul 18 10:40:06 UTC 2023

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.0
Extended Update Support.

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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Real Time EUS (v.9.0) - x86_64
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0) - x86_64

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

* kernel: uninitialized registers on stack in nft_do_chain can cause kernel
pointer leakage to UM (CVE-2022-1016)

* kernel: use-after-free related to leaf anon_vma double reuse
(CVE-2022-42703)

* Kernel: bluetooth: Unauthorized management command execution
(CVE-2023-2002)

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

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 RT source tree to the latest RHEL-9.0.z10 Batch
(BZ#2209984)

4. 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.

5. Bugs fixed (https://bugzilla.redhat.com/):

2066614 - CVE-2022-1016 kernel: uninitialized registers on stack in nft_do_chain can cause kernel pointer leakage to UM
2133483 - CVE-2022-42703 kernel: use-after-free related to leaf anon_vma double reuse
2147364 - CVE-2022-42896 kernel: use-after-free in l2cap_connect and l2cap_le_connect_req in net/bluetooth/l2cap_core.c
2187308 - CVE-2023-2002 Kernel: bluetooth: Unauthorized management command execution
2187439 - CVE-2023-2124 kernel: OOB access in the Linux kernel's XFS subsystem
2192589 - CVE-2023-2235 kernel: use-after-free vulnerability in the perf_group_detach function of the Linux Kernel Performance Events

6. Package List:

Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0):

Source:
kernel-rt-5.14.0-70.64.1.rt21.135.el9_0.src.rpm

x86_64:
kernel-rt-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-core-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-debug-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-debug-core-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-debug-debuginfo-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-debug-devel-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-debug-kvm-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-debug-modules-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-debug-modules-extra-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-debuginfo-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-devel-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-kvm-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-modules-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-modules-extra-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm

Red Hat Enterprise Linux Real Time EUS (v.9.0):

Source:
kernel-rt-5.14.0-70.64.1.rt21.135.el9_0.src.rpm

x86_64:
kernel-rt-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-core-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-debug-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-debug-core-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-debug-debuginfo-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-debug-devel-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-debug-modules-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-debug-modules-extra-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-debuginfo-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-devel-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-modules-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
kernel-rt-modules-extra-5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2022-1016
https://access.redhat.com/security/cve/CVE-2022-42703
https://access.redhat.com/security/cve/CVE-2022-42896
https://access.redhat.com/security/cve/CVE-2023-2002
https://access.redhat.com/security/cve/CVE-2023-2124
https://access.redhat.com/security/cve/CVE-2023-2235
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert at redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2023 Red Hat, Inc.
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