(RHSA-2023:6583) Important: kernel security, bug fix, and enhancement update

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

Security Fix(es):

• kernel: net/sched: cls_u32 component reference counter leak if tcf_change_indev() fails (CVE-2023-3609)

• kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and cls_route (CVE-2023-4128, CVE-2023-4206, CVE-2023-4207, CVE-2023-4208)

• kernel: eBPF: insufficient stack type checks in dynptr (CVE-2023-39191)

• Kernel: race when faulting a device private page in memory manager (CVE-2022-3523)

• kernel: use-after-free in l1oip timer handlers (CVE-2022-3565)

• kernel: Rate limit overflow messages in r8152 in intr_callback (CVE-2022-3594)

• kernel: vmwgfx: use-after-free in vmw_cmd_res_check (CVE-2022-38457)

• kernel: vmwgfx: use-after-free in vmw_execbuf_tie_context (CVE-2022-40133)

• hw: Intel: Gather Data Sampling (GDS) side channel vulnerability (CVE-2022-40982)

• kernel: Information leak in l2cap_parse_conf_req in net/bluetooth/l2cap_core.c (CVE-2022-42895)

• kernel: x86/mm: Randomize per-cpu entry area (CVE-2023-0597)

• kernel: HID: check empty report_list in hid_validate_values() (CVE-2023-1073)

• kernel: sctp: fail if no bound addresses can be used for a given scope (CVE-2023-1074)

• kernel: hid: Use After Free in asus_remove() (CVE-2023-1079)

• kernel: hash collisions in the IPv6 connection lookup table (CVE-2023-1206)

• kernel: ovl: fix use after free in struct ovl_aio_req (CVE-2023-1252)

• Kernel: use-after-free in nfsd4_ssc_setup_dul in fs/nfsd/nfs4proc.c (CVE-2023-1652)

• kernel: Use after free bug in btsdio_remove due to race condition (CVE-2023-1989)

• kernel: fbcon: shift-out-of-bounds in fbcon_set_font() (CVE-2023-3161)

• kernel: out-of-bounds access in relay_file_read (CVE-2023-3268)

• kernel: xfrm: NULL pointer dereference in xfrm_update_ae_params() (CVE-2023-3772)

• kernel: xfrm: out-of-bounds read of XFRMA_MTIMER_THRESH nlattr (CVE-2023-3773)

• kernel: KVM: SEV-ES / SEV-SNP VMGEXIT double fetch vulnerability (CVE-2023-4155)

• kernel: exFAT: stack overflow in exfat_get_uniname_from_ext_entry (CVE-2023-4273)

• kernel: mpls: double free on sysctl allocation failure (CVE-2023-26545)

• kernel: KVM: nVMX: missing consistency checks for CR0 and CR4 (CVE-2023-30456)

• kernel: net: qcom/emac: race condition leading to use-after-free in emac_remove() (CVE-2023-33203)

• kernel: vmwgfx: race condition leading to information disclosure vulnerability (CVE-2023-33951)

• kernel: vmwgfx: double free within the handling of vmw_buffer_object objects (CVE-2023-33952)

• kernel: r592: race condition leading to use-after-free in r592_remove() (CVE-2023-35825)

• kernel: net/tls: tls_is_tx_ready() checked list_entry (CVE-2023-1075)

• kernel: tap: tap_open(): correctly initialize socket uid (CVE-2023-1076)

• kernel: missing mmap_lock in file_files_note that could possibly lead to a use after free in the coredump code (CVE-2023-1249)

• kernel: use-after-free bug in remove function xgene_hwmon_remove (CVE-2023-1855)

• kernel: Use after free bug in r592_remove (CVE-2023-3141)

• kernel: gfs2: NULL pointer dereference in gfs2_evict_inode() (CVE-2023-3212)

• kernel: NULL pointer dereference due to missing kalloc() return value check in shtp_cl_get_dma_send_buf() (CVE-2023-3358)

• kernel: tap: tap_open(): correctly initialize socket uid next fix of i_uid to current_fsuid (CVE-2023-4194)

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 9.3 Release Notes linked from the References section.