RHSA-2024:1268 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.2 Telecommunications Update Service.

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 packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: nf_tables: stack-out-of-bounds-read in nft_byteorder_eval() (CVE-2023-35001,ZDI-CAN-20721)
• hw: Intel: Gather Data Sampling (GDS) side channel vulnerability (CVE-2022-40982,Downfall)
• kernel: net/sched: sch_qfq component can be exploited if in qfq_change_agg function happens qfq_enqueue overhead (CVE-2023-3611)
• kernel: fbcon: out-of-sync arrays in fbcon_mode_deleted due to wrong con2fb_map assignment (CVE-2023-38409)
• kernel: net/sched: sch_hfsc UAF (CVE-2023-4623)
• kernel: null-ptr-deref vulnerabilities in sl_tx_timeout in drivers/net/slip (CVE-2022-41858)
• kernel: nfp: use-after-free in area_cache_get() (CVE-2022-3545)
• kernel: use-after-free in l2cap_sock_release in net/bluetooth/l2cap_sock.c (CVE-2023-40283)
• kernel: use after free in nvmet_tcp_free_crypto in NVMe (CVE-2023-5178)
• kernel: IGB driver inadequate buffer size for frames larger than MTU (CVE-2023-45871)
• kernel: out-of-bounds write in qfq_change_class function (CVE-2023-31436)
• kernel: inactive elements in nft_pipapo_walk (CVE-2023-6817)
• kernel: ktls overwrites readonly memory pages when using function splice with a ktls socket as destination (CVE-2024-0646)
• kernel: UAF in nftables when nft_set_lookup_global triggered after handling named and anonymous sets in batch requests (CVE-2023-3390)
• kernel: vmwgfx: NULL pointer dereference in vmw_cmd_dx_define_query (CVE-2022-38096)
• kernel: use-after-free in sch_qfq network scheduler (CVE-2023-4921)

Bug Fix(es):

• kernel: fbcon: out-of-sync arrays in fbcon_mode_deleted due to wrong con2fb_map assignment (JIRA:RHEL-1203)
• How to reduce or prevent thousands of kworker/events_freezable_power_efficient threads being created every time multipath -ll is run (JIRA:RHEL-15054)
• kernel: net/sched: sch_hfsc UAF (JIRA:RHEL-16461)
• [SanityOnly][kernel]BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:35 at: sock_map_update_elem_sys+0x85/0x2a0 (JIRA:RHEL-6126)
• kernel: hw: Intel: Gather Data Sampling (GDS) side channel vulnerability (JIRA:RHEL-9246)
• ipoib mcast lockup fix (JIRA:RHEL-19695)

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, 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 Server - AUS 8.2 x86_64
• Red Hat Enterprise Linux Server - TUS 8.2 x86_64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.2 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.2 x86_64

Fixes

• BZ - 2133452 - CVE-2022-38096 kernel: vmwgfx: NULL pointer dereference in vmw_cmd_dx_define_query
• BZ - 2144379 - CVE-2022-41858 kernel: null-ptr-deref vulnerabilities in sl_tx_timeout in drivers/net/slip
• BZ - 2161310 - CVE-2022-3545 kernel: nfp: use-after-free in area_cache_get()
• BZ - 2192671 - CVE-2023-31436 kernel: out-of-bounds write in qfq_change_class function
• BZ - 2213260 - CVE-2023-3390 kernel: UAF in nftables when nft_set_lookup_global triggered after handling named and anonymous sets in batch requests
• BZ - 2220892 - CVE-2023-35001 kernel: nf_tables: stack-out-of-bounds-read in nft_byteorder_eval()
• BZ - 2223949 - CVE-2022-40982 hw: Intel: Gather Data Sampling (GDS) side channel vulnerability
• BZ - 2225191 - CVE-2023-3611 kernel: net/sched: sch_qfq component can be exploited if in qfq_change_agg function happens qfq_enqueue overhead
• BZ - 2230042 - CVE-2023-38409 kernel: fbcon: out-of-sync arrays in fbcon_mode_deleted due to wrong con2fb_map assignment
• BZ - 2231800 - CVE-2023-40283 kernel: use-after-free in l2cap_sock_release in net/bluetooth/l2cap_sock.c
• BZ - 2237757 - CVE-2023-4623 kernel: net/sched: sch_hfsc UAF
• BZ - 2241924 - CVE-2023-5178 kernel: use after free in nvmet_tcp_free_crypto in NVMe
• BZ - 2244723 - CVE-2023-45871 kernel: IGB driver inadequate buffer size for frames larger than MTU
• BZ - 2245514 - CVE-2023-4921 kernel: use-after-free in sch_qfq network scheduler
• BZ - 2253908 - CVE-2024-0646 kernel: ktls overwrites readonly memory pages when using function splice with a ktls socket as destination
• BZ - 2255139 - CVE-2023-6817 kernel: inactive elements in nft_pipapo_walk

CVEs

• CVE-2022-3545
• CVE-2022-38096
• CVE-2022-40982
• CVE-2022-41858
• CVE-2023-3390
• CVE-2023-3611
• CVE-2023-4623
• CVE-2023-4921
• CVE-2023-5178
• CVE-2023-6817
• CVE-2023-31436
• CVE-2023-35001
• CVE-2023-38409
• CVE-2023-40283
• CVE-2023-45871
• CVE-2024-0646

References

• https://access.redhat.com/security/updates/classification/#important