The following advisory data is extracted from:

https://access.redhat.com/security/data/csaf/v2/advisories/2023/rhsa-2023_7539.json

Red Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.

- Packet Storm Staff




====================================================================
Red Hat Security Advisory

Synopsis:           Important: kernel security, bug fix, and enhancement update
Advisory ID:        RHSA-2023:7539-01
Product:            Red Hat Enterprise Linux
Advisory URL:       https://access.redhat.com/errata/RHSA-2023:7539
Issue date:         2023-11-28
Revision:           01
CVE Names:          CVE-2022-40982
====================================================================

Summary: 

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: 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: netfilter: potential slab-out-of-bound access due to integer underflow (CVE-2023-42753)

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

* kernel: use-after-free due to race condition occurring in dvb_register_device() (CVE-2022-45884)

* kernel: use-after-free due to race condition occurring in dvb_net.c (CVE-2022-45886)

* kernel: use-after-free due to race condition occurring in dvb_ca_en50221.c (CVE-2022-45919)

* kernel: Race between task migrating pages and another task calling exit_mmap to release those same pages getting invalid opcode BUG in include/linux/swapops.h (CVE-2023-4732)

* kernel: fbcon: out-of-sync arrays in fbcon_mode_deleted due to wrong con2fb_map assignment (CVE-2023-38409)

* kernel: use-after-free in smb2_is_status_io_timeout() (CVE-2023-1192)

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):

* Intel 8.8 BUG SPR IOMMU: QAT Device Address Translation Issue with Invalidation Completion Ordering (BZ#2221097)

* RHEL 8.9: intel_pstate may provide incorrect scaling values for hybrid capable systems with E-cores disabled (BZ#2223403)

* Bring MD code inline with upstream (BZ#2235655)

* NAT sport clash in OCP causing 1 second TCP connection establishment delay. (BZ#2236514)

* ibmvnic: NONFATAL reset causes dql BUG_ON crash (BZ#2236701)

* PVT:1050:NXGZIP: LPM of RHEL client lpar got failed with error HSCLA2CF in 19th loops (BZ#2236703)

* xfs: mount fails when device file name is long (BZ#2236813)

* NFSv4.0 client hangs when server reboot while client had outstanding lock request to the server (BZ#2237840)

* i40e: backport selected bugfixes (BZ#2238305)

* Updates for NFS/NFSD/SUNRPC for RHEL 8.9 (BZ#2238394)

* SCSI updates for RHEL 8.9 (BZ#2238770)

* kernel: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:35 at: sock_map_update_elem_sys+0x85/0x2a0 (BZ#2239475)

* Random delay receiving packets after bringing up VLAN on top of VF with vf-vlan-pruning enabled (BZ#2240751)

* RHEL-8.9 RDMA/restrack: Release MR restrack when delete (BZ#2244423)

Enhancement(s):

* Intel 8.9 FEAT EMR power: Add EMR CPU support to intel_rapl driver (BZ#2230146)

* Intel 8.9 FEAT EMR tools: Add EMR CPU support to turbostat (BZ#2230154)

* Intel 8.9 FEAT EMR power: Add EMR support to the intel_idle driver (BZ#2230155)

* Intel 8.9 FEAT EMR RAS: Add EDAC support for EMR (BZ#2230161)

* Intel 8.9 FEAT general: intel-speed-select (ISST): Update to latest release (BZ#2230163)

* Intel 8.9 FEAT cpufreq: intel_pstate: Enable HWP IO boost for all servers (BZ#2232123)


Solution:

https://access.redhat.com/articles/11258



CVEs:

CVE-2022-40982

References:

https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/solutions/7027704
https://bugzilla.redhat.com/show_bug.cgi?id=2148510
https://bugzilla.redhat.com/show_bug.cgi?id=2148517
https://bugzilla.redhat.com/show_bug.cgi?id=2151956
https://bugzilla.redhat.com/show_bug.cgi?id=2154178
https://bugzilla.redhat.com/show_bug.cgi?id=2223949
https://bugzilla.redhat.com/show_bug.cgi?id=2225201
https://bugzilla.redhat.com/show_bug.cgi?id=2225511
https://bugzilla.redhat.com/show_bug.cgi?id=2230042
https://bugzilla.redhat.com/show_bug.cgi?id=2236982
https://bugzilla.redhat.com/show_bug.cgi?id=2239843