An update for kernel is now available for Red Hat Enterprise Linux 8.8 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.

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: net/sched: sch_qfq component can be exploited if in qfq_change_agg
 function happens qfq_enqueue overhead (CVE-2023-3611)

* kernel: tun: bugs for oversize packet when napi frags enabled in
 tun_napi_alloc_frags (CVE-2023-3812)

* kernel: use after free in unix_stream_sendpage (CVE-2023-4622)

* kernel: net/sched: sch_hfsc UAF (CVE-2023-4623)

* kernel: use after free in nvmet_tcp_free_crypto in NVMe (CVE-2023-5178)

* kernel: out-of-bounds write in qfq_change_class function (CVE-2023-31436)

* 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: speculative pointer dereference in do_prlimit() in kernel/sys.c
 (CVE-2023-0458)

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

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

* kernel: Possible use-after-free since the two fdget() during
 vhost_net_set_backend() (CVE-2023-1838)

* kernel: UAF during login when accessing the shost ipaddress (CVE-2023-2162)

* kernel: use after free in vcs_read in drivers/tty/vt/vc_screen.c due to race
 (CVE-2023-3567)

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

* kernel: smsusb: use-after-free caused by do_submit_urb() (CVE-2023-4132)

* kernel: A heap out-of-bounds write (CVE-2023-5717)

* kernel: denial of service in atm_tc_enqueue in net/sched/sch_atm.c due to
 type confusion (CVE-2023-23455)

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

* kernel: Denial of service issue in az6027 driver in
 drivers/media/usb/dev-usb/az6027.c (CVE-2023-28328)

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

* kernel: saa7134: race condition leading to use-after-free in
 saa7134_finidev() (CVE-2023-35823)

* kernel: dm1105: race condition leading to use-after-free in dm1105_remove.c()
 (CVE-2023-35824)

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

* kernel: SEV-ES local priv escalation (CVE-2023-46813)

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

* 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)

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):

* [RHEL 8.9] Proactively backport locking fixes from upstream (BZ#2235393)

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CVE-2023-0458: NULL Pointer Dereference (CWE-476)
CVE-2023-1073: Out-of-bounds Write (CWE-787)
CVE-2023-1075: Access of Resource Using Incompatible Type ('Type
 Confusion') (CWE-843)
CVE-2023-1079: Use After Free (CWE-416)
CVE-2023-1838: Use After Free (CWE-416)
CVE-2023-1855: Use After Free (CWE-416)
CVE-2023-2162: Use After Free (CWE-416)
CVE-2023-2163: Incorrect Calculation (CWE-682)
CVE-2023-3141: Use After Free (CWE-416)
CVE-2023-3567: Use After Free (CWE-416)
CVE-2023-3611: Out-of-bounds Write (CWE-787)
CVE-2023-3772: NULL Pointer Dereference (CWE-476)
CVE-2023-3812: Out-of-bounds Write (CWE-787)
CVE-2023-4132: Use After Free (CWE-416)
CVE-2023-4622: Use After Free (CWE-416)
CVE-2023-4623: Use After Free (CWE-416)
CVE-2023-5178: Use After Free (CWE-416)
CVE-2023-5717: Out-of-bounds Write (CWE-787)
CVE-2023-23455: Access of Resource Using Incompatible Type ('Type
 Confusion') (CWE-843)
CVE-2023-26545: Double Free (CWE-415)
CVE-2023-28328: NULL Pointer Dereference (CWE-476)
CVE-2023-31436: Out-of-bounds Write (CWE-787)
CVE-2023-33203: Use After Free (CWE-416)
CVE-2023-35823: Use After Free (CWE-416)
CVE-2023-35824: Use After Free (CWE-416)
CVE-2023-35825: Use After Free (CWE-416)
CVE-2023-45871: Buffer Copy without Checking Size of Input ('Classic Buffer
 Overflow') (CWE-120)
CVE-2023-46813: Improper Privilege Management (CWE-269)