The following advisory data is extracted from:

https://security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_8248.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




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Red Hat Security Advisory

Synopsis:           Important: kernel security update
Advisory ID:        RHSA-2025:8248-03
Product:            Red Hat Enterprise Linux
Advisory URL:       https://access.redhat.com/errata/RHSA-2025:8248
Issue date:         2025-05-28
Revision:           03
CVE Names:          CVE-2021-47495
====================================================================

Summary: 

An update for kernel is now available for Red Hat Enterprise Linux 9.4 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: ext4: avoid online resizing failures due to oversized flex bg (CVE-2023-52622)

* kernel: RDMA/mlx5: Fix fortify source warning while accessing Eth segment (CVE-2024-26907)

* kernel: do_sys_name_to_handle(): use kzalloc() to fix kernel-infoleak (CVE-2024-26901)

* kernel: tun: limit printing rate when illegal packet received by tun dev (CVE-2024-27013)

* kernel: fat: fix uninitialized field in nostale filehandles (CVE-2024-26973)

* kernel: wifi: rtw89: fix null pointer access when abort scan (CVE-2024-35946)

* kernel: net/usb: kalmia: Don't pass act_len in usb_bulk_msg error path (CVE-2023-52703)

* kernel: Input: synaptics-rmi4 - fix use after free in rmi_unregister_function() (CVE-2023-52840)

* kernel: usbnet: sanity check for maxpacket (CVE-2021-47495)

* kernel: drm/dp_mst: Fix resetting msg rx state after topology removal (CVE-2024-57876)

* kernel: vsock: Keep the binding until socket destruction (CVE-2025-21756)

* kernel: net: ppp: Add bound checking for skb data on ppp_sync_txmung (CVE-2025-37749)

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.


Solution:

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



CVEs:

CVE-2021-47495

References:

https://access.redhat.com/security/updates/classification/#important
https://bugzilla.redhat.com/show_bug.cgi?id=2271688
https://bugzilla.redhat.com/show_bug.cgi?id=2275633
https://bugzilla.redhat.com/show_bug.cgi?id=2275645
https://bugzilla.redhat.com/show_bug.cgi?id=2278270
https://bugzilla.redhat.com/show_bug.cgi?id=2278356
https://bugzilla.redhat.com/show_bug.cgi?id=2281833
https://bugzilla.redhat.com/show_bug.cgi?id=2282612
https://bugzilla.redhat.com/show_bug.cgi?id=2282757
https://bugzilla.redhat.com/show_bug.cgi?id=2282920
https://bugzilla.redhat.com/show_bug.cgi?id=2337142
https://bugzilla.redhat.com/show_bug.cgi?id=2348609
https://bugzilla.redhat.com/show_bug.cgi?id=2363332