RHSA-2024:1269 - Security Advisory

Topic

An update for kernel-rt is now available for 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-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

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

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.

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 - Telecommunications Update Service 8.2 x86_64
• Red Hat Enterprise Linux for Real Time for NFV - Telecommunications Update Service 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
• https://access.redhat.com/solutions/7027704