RHSA-2022:7933 - Security Advisory

Topic

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 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.

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)
• use-after-free vulnerability in function sco_sock_sendmsg() (CVE-2021-3640)
• 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 and memory errors in ext4 when mounting and operating on a corrupted image (CVE-2022-1184)
• concurrency use-after-free between drm_setmaster_ioctl and drm_mode_getresources (CVE-2022-1280)
• kernel info leak issue in pfkey_register (CVE-2022-1353)
• use-after-free in ath9k_htc_probe_device() could cause an escalation of privileges (CVE-2022-1679)
• NULL pointer dereference in x86_emulate_insn may lead to DoS (CVE-2022-1852)
• fanotify misuses fd_install() which could lead to use-after-free (CVE-2022-1998)
• 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)
• slab-out-of-bounds access in packet_recvmsg() (CVE-2022-20368)
• incomplete clean-up of multi-core shared buffers (aka SBDR) (CVE-2022-21123)
• incomplete clean-up of microarchitectural fill buffers (aka SBDS) (CVE-2022-21125)
• incomplete clean-up in specific special register write operations (aka DRPW) (CVE-2022-21166)
• possible to use the debugger to write zero into a location of choice (CVE-2022-21499)
• AMD: RetBleed Arbitrary Speculative Code Execution with Return Instructions (CVE-2022-23816, CVE-2022-29900)
• AMD: Branch Type Confusion (non-retbleed) (CVE-2022-23825)
• Intel: Post-barrier Return Stack Buffer Predictions (CVE-2022-26373)
• 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)
• Intel: RetBleed Arbitrary Speculative Code Execution with Return Instructions (CVE-2022-29901)
• DoS in nfqnl_mangle in net/netfilter/nfnetlink_queue.c (CVE-2022-36946)
• nf_tables disallow binding to already bound chain (CVE-2022-39190)
• 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 9.1 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

• Red Hat Enterprise Linux for Real Time 9 x86_64
• Red Hat Enterprise Linux for Real Time for NFV 9 x86_64
• Red Hat Enterprise Linux for Real Time for x86_64 - 4 years of updates 9.4 x86_64
• Red Hat Enterprise Linux for Real Time for x86_64 - 4 years of updates 9.2 x86_64
• Red Hat Enterprise Linux for Real Time for NFV for x86_64 - 4 years of updates 9.4 x86_64
• Red Hat Enterprise Linux for Real Time for NFV for x86_64 - 4 years of updates 9.2 x86_64

Fixes

• BZ - 1980646 - CVE-2021-3640 kernel: use-after-free vulnerability in function sco_sock_sendmsg()
• BZ - 2037386 - CVE-2022-0168 kernel: smb2_ioctl_query_info NULL pointer dereference
• BZ - 2051444 - CVE-2022-24448 kernel: nfs_atomic_open() returns uninitialized data instead of ENOTDIR
• BZ - 2052312 - CVE-2022-1998 kernel: fanotify misuses fd_install() which could lead to use-after-free
• BZ - 2053632 - CVE-2022-0617 kernel: NULL pointer dereference in udf_expand_file_adinicbdue() during writeback
• BZ - 2058395 - CVE-2022-0854 kernel: swiotlb information leak with DMA_FROM_DEVICE
• BZ - 2059928 - CVE-2020-36516 kernel: off-path attacker may inject data or terminate victim's TCP session
• BZ - 2066614 - CVE-2022-1016 kernel: uninitialized registers on stack in nft_do_chain can cause kernel pointer leakage to UM
• BZ - 2066706 - CVE-2022-1048 kernel: race condition in snd_pcm_hw_free leading to use-after-free
• BZ - 2066819 - CVE-2022-1353 kernel: kernel info leak issue in pfkey_register
• BZ - 2070205 - CVE-2022-1184 kernel: use-after-free and memory errors in ext4 when mounting and operating on a corrupted image
• BZ - 2071022 - CVE-2022-1280 kernel: concurrency use-after-free between drm_setmaster_ioctl and drm_mode_getresources
• BZ - 2073064 - CVE-2022-28390 kernel: double free in ems_usb_start_xmit in drivers/net/can/usb/ems_usb.c
• BZ - 2074208 - CVE-2022-28893 kernel: use after free in SUNRPC subsystem
• BZ - 2084125 - CVE-2022-1679 kernel: use-after-free in ath9k_htc_probe_device() could cause an escalation of privileges
• BZ - 2084183 - CVE-2022-21499 kernel: possible to use the debugger to write zero into a location of choice
• BZ - 2084479 - CVE-2022-2639 kernel: openvswitch: integer underflow leads to out-of-bounds write in reserve_sfa_size()
• BZ - 2088021 - CVE-2022-29581 kernel: use-after-free due to improper update of reference count in net/sched/cls_u32.c
• BZ - 2089815 - CVE-2022-1852 kernel: NULL pointer dereference in x86_emulate_insn may lead to DoS
• BZ - 2090226 - CVE-2022-23816 CVE-2022-29900 hw: cpu: AMD: RetBleed Arbitrary Speculative Code Execution with Return Instructions
• BZ - 2090237 - CVE-2022-21123 hw: cpu: incomplete clean-up of multi-core shared buffers (aka SBDR)
• BZ - 2090240 - CVE-2022-21125 hw: cpu: incomplete clean-up of microarchitectural fill buffers (aka SBDS)
• BZ - 2090241 - CVE-2022-21166 hw: cpu: incomplete clean-up in specific special register write operations (aka DRPW)
• BZ - 2103148 - CVE-2022-29901 hw: cpu: Intel: RetBleed Arbitrary Speculative Code Execution with Return Instructions
• BZ - 2103153 - CVE-2022-23825 hw: cpu: AMD: Branch Type Confusion (non-retbleed)
• BZ - 2114878 - CVE-2022-2586 kernel: nf_tables cross-table potential use-after-free may lead to local privilege escalation
• BZ - 2115065 - CVE-2022-26373 hw: cpu: Intel: Post-barrier Return Stack Buffer Predictions
• BZ - 2115278 - CVE-2022-36946 kernel: DoS in nfqnl_mangle in net/netfilter/nfnetlink_queue.c
• BZ - 2123695 - CVE-2022-20368 kernel: net/packet: slab-out-of-bounds access in packet_recvmsg()
• BZ - 2129152 - CVE-2022-39190 kernel: nf_tables disallow binding to already bound chain

CVEs

• CVE-2020-36516
• CVE-2021-3640
• CVE-2021-47099
• CVE-2021-47556
• CVE-2022-0168
• CVE-2022-0617
• CVE-2022-0854
• CVE-2022-1016
• CVE-2022-1048
• CVE-2022-1158
• CVE-2022-1184
• CVE-2022-1263
• CVE-2022-1280
• CVE-2022-1353
• CVE-2022-1679
• CVE-2022-1852
• CVE-2022-1998
• CVE-2022-2153
• CVE-2022-2503
• CVE-2022-2586
• CVE-2022-2639
• CVE-2022-3107
• CVE-2022-3108
• CVE-2022-3239
• CVE-2022-20368
• CVE-2022-20572
• CVE-2022-21123
• CVE-2022-21125
• CVE-2022-21166
• CVE-2022-21499
• CVE-2022-23816
• CVE-2022-23825
• CVE-2022-24448
• CVE-2022-26373
• CVE-2022-28390
• CVE-2022-28693
• CVE-2022-28893
• CVE-2022-29581
• CVE-2022-29900
• CVE-2022-29901
• CVE-2022-36946
• CVE-2022-39190
• CVE-2022-42432
• CVE-2022-48905
• CVE-2022-48918
• CVE-2022-48936
• CVE-2023-1095
• CVE-2023-2008

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/9.1_release_notes/index
• https://access.redhat.com/solutions/6971358