(RHSA-2024:0448) Important: kernel security and bug fix update

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

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: 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.

Bug Fix(es):

• sev-guest is not loaded automatically in the guest kernel when sev-snp is enabled (BZ#2218934)

• Cgroups v2: Current interface to disable cpu load balancing not compatible with kubernetes cgroup hierarchy (BZ#2238754)

• WPC ice driver misc irq not getting generated for a interface. (BZ#2245881)

• RHEL9.0 - s390/qeth: NET2016 - fix use-after-free in HSCI (BZ#2247798)

• pNFS/filelayout: treat GETDEVICEINFO errors as layout failure (BZ#2249557)

• cifs: fix dentry lookups in directory handle cache (BZ#2249558)

• Performance regression with random 2 KiB writes to ext4 filesystem with 4 KiB filesystem blocks (BZ#2249685)

• kernel.spec: Fix UKI naming to comply with BLS (BZ#2254546)