RHSA-2024:0439 - Security Advisory

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.2 Extended Update Support.

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):

• kernel: bpf: Incorrect verifier pruning leads to unsafe code paths being incorrectly marked as safe (CVE-2023-2163)
• kernel: use after free in unix_stream_sendpage (CVE-2023-4622)
• kernel: net/sched: sch_hfsc UAF (CVE-2023-4623)
• kernel: eBPF: insufficient stack type checks in dynptr (CVE-2023-39191)
• kernel: IGB driver inadequate buffer size for frames larger than MTU (CVE-2023-45871)
• kernel: Race Condition leading to UAF in Unix Socket could happen in sk_receive_queue (BZ#2230094)
• kernel: nfp: use-after-free in area_cache_get() (CVE-2022-3545)
• kernel: null-ptr-deref vulnerabilities in sl_tx_timeout in drivers/net/slip (CVE-2022-41858)
• kernel: UAF during login when accessing the shost ipaddress (CVE-2023-2162)
• kernel: NULL pointer dereference in can_rcv_filter (CVE-2023-2166)
• kernel: Slab-out-of-bound read in compare_netdev_and_ip (CVE-2023-2176)
• kernel: use after free in vcs_read in drivers/tty/vt/vc_screen.c due to race (CVE-2023-3567)
• kernel: use-after-free in netfilter: nf_tables (CVE-2023-3777)
• kernel: use after free in nft_immediate_deactivate (CVE-2023-4015)
• kernel: A heap out-of-bounds write (CVE-2023-5717)
• hw amd: Return Address Predictor vulnerability leading to information disclosure (CVE-2023-20569)
• kernel: fbcon: out-of-sync arrays in fbcon_mode_deleted due to wrong con2fb_map assignment (CVE-2023-38409)
• kernel: use-after-free in l2cap_sock_release in net/bluetooth/l2cap_sock.c (CVE-2023-40283)
• kernel: SEV-ES local priv escalation (CVE-2023-46813)
• kernel: use-after-free in smb2_is_status_io_timeout() (CVE-2023-1192)
• kernel: NULL pointer dereference in dpll_pin_parent_pin_set() in drivers/dpll/dpll_netlink.c (CVE-2023-6679)

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 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 9.2 x86_64

Fixes

• BZ - 2144379 - CVE-2022-41858 kernel: null-ptr-deref vulnerabilities in sl_tx_timeout in drivers/net/slip
• BZ - 2154178 - CVE-2023-1192 kernel: use-after-free in smb2_is_status_io_timeout()
• BZ - 2161310 - CVE-2022-3545 kernel: nfp: use-after-free in area_cache_get()
• BZ - 2187773 - CVE-2023-2162 kernel: UAF during login when accessing the shost ipaddress
• BZ - 2187813 - CVE-2023-2166 kernel: NULL pointer dereference in can_rcv_filter
• BZ - 2187931 - CVE-2023-2176 kernel: Slab-out-of-bound read in compare_netdev_and_ip
• BZ - 2207625 - CVE-2023-20569 hw amd: Return Address Predictor vulnerability leading to information disclosure
• BZ - 2221463 - CVE-2023-3567 kernel: use after free in vcs_read in drivers/tty/vt/vc_screen.c due to race
• BZ - 2226783 - CVE-2023-39191 kernel: eBPF: insufficient stack type checks in dynptr
• BZ - 2230042 - CVE-2023-38409 kernel: fbcon: out-of-sync arrays in fbcon_mode_deleted due to wrong con2fb_map assignment
• BZ - 2230094 - kernel: Race Condition leading to UAF in Unix Socket could happen in sk_receive_queue
• BZ - 2231800 - CVE-2023-40283 kernel: use-after-free in l2cap_sock_release in net/bluetooth/l2cap_sock.c
• BZ - 2237750 - CVE-2023-3777 kernel: use-after-free in netfilter: nf_tables
• BZ - 2237752 - CVE-2023-4015 kernel: use after free in nft_immediate_deactivate
• BZ - 2237757 - CVE-2023-4623 kernel: net/sched: sch_hfsc UAF
• BZ - 2237760 - CVE-2023-4622 kernel: use after free in unix_stream_sendpage
• BZ - 2240249 - CVE-2023-2163 kernel: bpf: Incorrect verifier pruning leads to unsafe code paths being incorrectly marked as safe
• BZ - 2244723 - CVE-2023-45871 kernel: IGB driver inadequate buffer size for frames larger than MTU
• BZ - 2246944 - CVE-2023-46813 kernel: SEV-ES local priv escalation
• BZ - 2246945 - CVE-2023-5717 kernel: A heap out-of-bounds write
• BZ - 2253986 - CVE-2023-6679 kernel: NULL pointer dereference in dpll_pin_parent_pin_set() in drivers/dpll/dpll_netlink.c

CVEs

• CVE-2022-3545
• CVE-2022-41858
• CVE-2023-1192
• CVE-2023-2162
• CVE-2023-2163
• CVE-2023-2166
• CVE-2023-2176
• CVE-2023-3567
• CVE-2023-3777
• CVE-2023-4015
• CVE-2023-4622
• CVE-2023-4623
• CVE-2023-5717
• CVE-2023-6679
• CVE-2023-20569
• CVE-2023-38409
• CVE-2023-39191
• CVE-2023-40283
• CVE-2023-45871
• CVE-2023-46813

References

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