A kernel-rt security and bug fix update has been released for Red Hat Enterprise Linux 8.

RHSA-2022:7444-01: Moderate: kernel-rt security and bug fix update

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Red Hat Security Advisory

Synopsis: Moderate: kernel-rt security and bug fix update
Advisory ID: RHSA-2022:7444-01
Product: Red Hat Enterprise Linux
Advisory URL:   https://access.redhat.com/errata/RHSA-2022:7444
Issue date: 2022-11-08
CVE Names: CVE-2020-36516 CVE-2020-36558 CVE-2021-3640
CVE-2021-30002 CVE-2022-0168 CVE-2022-0617
CVE-2022-0854 CVE-2022-1016 CVE-2022-1048
CVE-2022-1055 CVE-2022-1184 CVE-2022-1852
CVE-2022-2078 CVE-2022-2586 CVE-2022-2639
CVE-2022-2938 CVE-2022-20368 CVE-2022-21499
CVE-2022-24448 CVE-2022-26373 CVE-2022-27950
CVE-2022-28390 CVE-2022-28893 CVE-2022-29581
CVE-2022-36946
=====================================================================

1. Summary:

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 Moderate. 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. 8) - x86_64
Red Hat Enterprise Linux Real Time for NFV (v. 8) - 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):

* off-path attacker may inject data or terminate victim's TCP session
(CVE-2020-36516)

* Race condition in VT_RESIZEX ioctl when vc_cons[i].d is already NULL
leading to NULL pointer dereference (CVE-2020-36558)

* use-after-free vulnerability in function sco_sock_sendmsg()
(CVE-2021-3640)

* Memory leak for large arguments in video_usercopy function in
drivers/media/v4l2-core/v4l2-ioctl.c (CVE-2021-30002)

* smb2_ioctl_query_info NULL Pointer Dereference (CVE-2022-0168)

* NULL pointer dereference in udf_expand_file_adinicbdue() during writeback
(CVE-2022-0617)

* swiotlb information leak with DMA_FROM_DEVICE (CVE-2022-0854)

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

* Race condition in snd_pcm_hw_free leading to use-after-free
(CVE-2022-1048)

* use-after-free in tc_new_tfilter() in net/sched/cls_api.c (CVE-2022-1055)

* use-after-free and memory errors in ext4 when mounting and operating on a
corrupted image (CVE-2022-1184)

* NULL pointer dereference in x86_emulate_insn may lead to DoS
(CVE-2022-1852)

* buffer overflow in nft_set_desc_concat_parse() (CVE-2022-2078)

* nf_tables cross-table potential use-after-free may lead to local
privilege escalation (CVE-2022-2586)

* openvswitch: integer underflow leads to out-of-bounds write in
reserve_sfa_size() (CVE-2022-2639)

* use-after-free when psi trigger is destroyed while being polled
(CVE-2022-2938)

* net/packet: slab-out-of-bounds access in packet_recvmsg()
(CVE-2022-20368)

* possible to use the debugger to write zero into a location of choice
(CVE-2022-21499)

* Post-barrier Return Stack Buffer Predictions (CVE-2022-26373)

* Memory leak in drivers/hid/hid-elo.c (CVE-2022-27950)

* Double free in ems_usb_start_xmit in drivers/net/can/usb/ems_usb.c
(CVE-2022-28390)

* Use after free in SUNRPC subsystem (CVE-2022-28893)

* use-after-free due to improper update of reference count in
net/sched/cls_u32.c (CVE-2022-29581)

* DoS in nfqnl_mangle in net/netfilter/nfnetlink_queue.c (CVE-2022-36946)

* nfs_atomic_open() returns uninitialized data instead of ENOTDIR
(CVE-2022-24448)

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 8.7 Release Notes linked from the References section.

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/):

1946279 - CVE-2021-30002 kernel: memory leak for large arguments in video_usercopy function in drivers/media/v4l2-core/v4l2-ioctl.c
1980646 - CVE-2021-3640 kernel: use-after-free vulnerability in function sco_sock_sendmsg()
2037386 - CVE-2022-0168 kernel: smb2_ioctl_query_info NULL pointer dereference
2037769 - Softirq hrtimers are being placed on the per-CPU softirq clocks on isolcpu?s.
2051444 - CVE-2022-24448 kernel: nfs_atomic_open() returns uninitialized data instead of ENOTDIR
2053632 - CVE-2022-0617 kernel: NULL pointer dereference in udf_expand_file_adinicbdue() during writeback
2058395 - CVE-2022-0854 kernel: swiotlb information leak with DMA_FROM_DEVICE
2059928 - CVE-2020-36516 kernel: off-path attacker may inject data or terminate victim's TCP session
2066614 - CVE-2022-1016 kernel: uninitialized registers on stack in nft_do_chain can cause kernel pointer leakage to UM
2066706 - CVE-2022-1048 kernel: race condition in snd_pcm_hw_free leading to use-after-free
2069408 - CVE-2022-27950 kernel: memory leak in drivers/hid/hid-elo.c
2070205 - CVE-2022-1184 kernel: use-after-free and memory errors in ext4 when mounting and operating on a corrupted image
2070220 - CVE-2022-1055 kernel: use-after-free in tc_new_tfilter() in net/sched/cls_api.c
2073064 - CVE-2022-28390 kernel: double free in ems_usb_start_xmit in drivers/net/can/usb/ems_usb.c
2074208 - CVE-2022-28893 kernel: use after free in SUNRPC subsystem
2084183 - CVE-2022-21499 kernel: possible to use the debugger to write zero into a location of choice
2084479 - CVE-2022-2639 kernel: openvswitch: integer underflow leads to out-of-bounds write in reserve_sfa_size()
2088021 - CVE-2022-29581 kernel: use-after-free due to improper update of reference count in net/sched/cls_u32.c
2089815 - CVE-2022-1852 kernel: NULL pointer dereference in x86_emulate_insn may lead to DoS
2096178 - CVE-2022-2078 kernel: buffer overflow in nft_set_desc_concat_parse()
2112693 - CVE-2020-36558 kernel: race condition in VT_RESIZEX ioctl when vc_cons[i].d is already NULL leading to NULL pointer dereference
2114878 - CVE-2022-2586 kernel: nf_tables cross-table potential use-after-free may lead to local privilege escalation
2115065 - CVE-2022-26373 hw: cpu: Intel: Post-barrier Return Stack Buffer Predictions
2115278 - CVE-2022-36946 kernel: DoS in nfqnl_mangle in net/netfilter/nfnetlink_queue.c
2120175 - CVE-2022-2938 kernel: use-after-free when psi trigger is destroyed while being polled
2123695 - CVE-2022-20368 kernel: net/packet: slab-out-of-bounds access in packet_recvmsg()

6. Package List:

Red Hat Enterprise Linux Real Time for NFV (v. 8):

Source:
kernel-rt-4.18.0-425.3.1.rt7.213.el8.src.rpm

x86_64:
kernel-rt-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-core-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-debug-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-debug-core-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-debug-debuginfo-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-debug-devel-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-debug-kvm-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-debug-modules-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-debug-modules-extra-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-debuginfo-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-devel-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-kvm-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-modules-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-modules-extra-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm

Red Hat Enterprise Linux Real Time (v. 8):

Source:
kernel-rt-4.18.0-425.3.1.rt7.213.el8.src.rpm

x86_64:
kernel-rt-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-core-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-debug-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-debug-core-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-debug-debuginfo-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-debug-devel-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-debug-modules-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-debug-modules-extra-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-debuginfo-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-devel-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-modules-4.18.0-425.3.1.rt7.213.el8.x86_64.rpm
kernel-rt-modules-extra-4.18.0-425.3.1.rt7.213.el8.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-2020-36516
  https://access.redhat.com/security/cve/CVE-2020-36558
  https://access.redhat.com/security/cve/CVE-2021-3640
  https://access.redhat.com/security/cve/CVE-2021-30002
  https://access.redhat.com/security/cve/CVE-2022-0168
  https://access.redhat.com/security/cve/CVE-2022-0617
  https://access.redhat.com/security/cve/CVE-2022-0854
  https://access.redhat.com/security/cve/CVE-2022-1016
  https://access.redhat.com/security/cve/CVE-2022-1048
  https://access.redhat.com/security/cve/CVE-2022-1055
  https://access.redhat.com/security/cve/CVE-2022-1184
  https://access.redhat.com/security/cve/CVE-2022-1852
  https://access.redhat.com/security/cve/CVE-2022-2078
  https://access.redhat.com/security/cve/CVE-2022-2586
  https://access.redhat.com/security/cve/CVE-2022-2639
  https://access.redhat.com/security/cve/CVE-2022-2938
  https://access.redhat.com/security/cve/CVE-2022-20368
  https://access.redhat.com/security/cve/CVE-2022-21499
  https://access.redhat.com/security/cve/CVE-2022-24448
  https://access.redhat.com/security/cve/CVE-2022-26373
  https://access.redhat.com/security/cve/CVE-2022-27950
  https://access.redhat.com/security/cve/CVE-2022-28390
  https://access.redhat.com/security/cve/CVE-2022-28893
  https://access.redhat.com/security/cve/CVE-2022-29581
  https://access.redhat.com/security/cve/CVE-2022-36946
  https://access.redhat.com/security/updates/classification/#moderate
  https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.7_release_notes/index
  https://access.redhat.com/solutions/6971358

8. Contact:

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

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