Important: kernel security and bug fix update

Topic

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.

Description

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)

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 x86_64 - Extended Update Support 8.8 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.8 s390x
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.8 ppc64le
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.8 aarch64
• Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 8.8 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 8.8 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 8.8 aarch64

Fixes

• BZ - 2087568 - CVE-2023-1838 kernel: Possible use-after-free since the two fdget() during vhost_net_set_backend()
• BZ - 2168332 - CVE-2023-23455 Kernel: denial of service in atm_tc_enqueue in net/sched/sch_atm.c due to type confusion
• BZ - 2173403 - CVE-2023-1073 kernel: HID: check empty report_list in hid_validate_values()
• BZ - 2173434 - CVE-2023-1075 kernel: net/tls: tls_is_tx_ready() checked list_entry
• BZ - 2173444 - CVE-2023-1079 kernel: hid: Use After Free in asus_remove()
• BZ - 2177389 - CVE-2023-28328 kernel: Denial of service issue in az6027 driver in drivers/media/usb/dev-usb/az6027.c
• BZ - 2182443 - CVE-2023-26545 kernel: mpls: double free on sysctl allocation failure
• BZ - 2184578 - CVE-2023-1855 kernel: use-after-free bug in remove function xgene_hwmon_remove
• BZ - 2187773 - CVE-2023-2162 kernel: UAF during login when accessing the shost ipaddress
• BZ - 2192667 - CVE-2023-33203 kernel: net: qcom/emac: race condition leading to use-after-free in emac_remove()
• BZ - 2192671 - CVE-2023-31436 kernel: out-of-bounds write in qfq_change_class function
• BZ - 2193219 - CVE-2023-0458 kernel: speculative pointer dereference in do_prlimit() in kernel/sys.c
• BZ - 2213199 - CVE-2023-3141 kernel: Use after free bug in r592_remove
• BZ - 2215835 - CVE-2023-35823 kernel: saa7134: race condition leading to use-after-free in saa7134_finidev()
• BZ - 2215836 - CVE-2023-35824 kernel: dm1105: race condition leading to use-after-free in dm1105_remove.c()
• BZ - 2215837 - CVE-2023-35825 kernel: r592: race condition leading to use-after-free in r592_remove()
• BZ - 2218943 - CVE-2023-3772 kernel: xfrm: NULL pointer dereference in xfrm_update_ae_params()
• BZ - 2221463 - CVE-2023-3567 kernel: use after free in vcs_read in drivers/tty/vt/vc_screen.c due to race
• BZ - 2221707 - CVE-2023-4132 kernel: smsusb: use-after-free caused by do_submit_urb()
• BZ - 2224048 - CVE-2023-3812 kernel: tun: bugs for oversize packet when napi frags enabled in tun_napi_alloc_frags
• 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 - 2230094 - kernel: Race Condition leading to UAF in Unix Socket could happen in sk_receive_queue
• 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 - 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 - 2246944 - CVE-2023-46813 kernel: SEV-ES local priv escalation
• BZ - 2246945 - CVE-2023-5717 kernel: A heap out-of-bounds write

CVEs

• CVE-2023-0458
• CVE-2023-1073
• CVE-2023-1075
• CVE-2023-1079
• CVE-2023-1838
• CVE-2023-1855
• CVE-2023-2162
• CVE-2023-2163
• CVE-2023-3141
• CVE-2023-3567
• CVE-2023-3611
• CVE-2023-3772
• CVE-2023-3812
• CVE-2023-4132
• CVE-2023-4622
• CVE-2023-4623
• CVE-2023-5178
• CVE-2023-5717
• CVE-2023-23455
• CVE-2023-26545
• CVE-2023-28328
• CVE-2023-31436
• CVE-2023-33203
• CVE-2023-35823
• CVE-2023-35824
• CVE-2023-35825
• CVE-2023-45871
• CVE-2023-46813

References

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