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Red Hat Security Advisory

Synopsis:          Important: kernel-rt security and bug fix update
Advisory ID:       RHSA-2022:7319-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2022:7319
Issue date:        2022-11-02
CVE Names:         CVE-2022-2585 CVE-2022-30594
====================================================================
1. Summary:

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.

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 (v. 9) - x86_64
Red Hat Enterprise Linux Real Time for NFV (v. 9) - 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):

* posix cpu timer use-after-free may lead to local privilege escalation
(CVE-2022-2585)

* Unprivileged users may use PTRACE_SEIZE to set PTRACE_O_SUSPEND_SECCOMP
option (CVE-2022-30594)

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):

* Update RT source tree to the latest RHEL-9.0.z4 Batch (BZ#2123498)

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/):

2085300 - CVE-2022-30594 kernel: Unprivileged users may use PTRACE_SEIZE to set PTRACE_O_SUSPEND_SECCOMP option
2114874 - CVE-2022-2585 kernel: posix cpu timer use-after-free may lead to local privilege escalation

6. Package List:

Red Hat Enterprise Linux Real Time for NFV (v. 9):

Source:
kernel-rt-5.14.0-70.30.1.rt21.102.el9_0.src.rpm

x86_64:
kernel-rt-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-core-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-debug-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-debug-core-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-debug-debuginfo-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-debug-devel-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-debug-kvm-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-debug-modules-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-debug-modules-extra-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-debuginfo-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-devel-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-kvm-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-modules-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-modules-extra-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm

Red Hat Enterprise Linux Real Time (v. 9):

Source:
kernel-rt-5.14.0-70.30.1.rt21.102.el9_0.src.rpm

x86_64:
kernel-rt-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-core-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-debug-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-debug-core-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-debug-debuginfo-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-debug-devel-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-debug-modules-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-debug-modules-extra-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-debuginfo-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-devel-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-modules-5.14.0-70.30.1.rt21.102.el9_0.x86_64.rpm
kernel-rt-modules-extra-5.14.0-70.30.1.rt21.102.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-2022-2585
https://access.redhat.com/security/cve/CVE-2022-30594
https://access.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2022 Red Hat, Inc.
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