The following advisory data is extracted from: https://security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_13135.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 update Advisory ID: RHSA-2025:13135-03 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2025:13135 Issue date: 2025-08-06 Revision: 03 CVE Names: CVE-2021-47527 ==================================================================== 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: powerpc: Fix access beyond end of drmem array (CVE-2023-52451) * kernel: xhci: handle isoc Babble and Buffer Overrun events properly (CVE-2024-26659) * kernel: usb: xhci: Add error handling in xhci_map_urb_for_dma (CVE-2024-26964) * kernel: USB: core: Fix deadlock in usb_deauthorize_interface() (CVE-2024-26934) * kernel: USB: usb-storage: Prevent divide-by-0 error in isd200_ata_command (CVE-2024-27059) * kernel: powerpc/pseries: Fix potential memleak in papr_get_attr() (CVE-2022-48669) * kernel: usb: typec: tcpm: Fix NULL pointer dereference in tcpm_pd_svdm() (CVE-2023-52877) * kernel: media: gspca: cpia1: shift-out-of-bounds in set_flicker (CVE-2023-52764) * kernel: serial: core: fix transmit-buffer reset and memleak (CVE-2021-47527) * kernel: net/smc: fix neighbour and rtable leak in smc_ib_find_route() (CVE-2024-36945) * kernel: mm: list_lru: fix UAF for memory cgroup (CVE-2024-43888) * kernel: um: Fix out-of-bounds read in LDT setup (CVE-2022-49395) * kernel: media: uvcvideo: Remove dangling pointers (CVE-2024-58002) * kernel: padata: fix UAF in padata_reorder (CVE-2025-21727) * kernel: media: uvcvideo: Fix double free in error path (CVE-2024-57980) * kernel: HID: intel-ish-hid: Fix use-after-free issue in ishtp_hid_remove() (CVE-2025-21928) * kernel: x86/microcode/AMD: Fix out-of-bounds on systems with CPU-less NUMA nodes (CVE-2025-21991) * kernel: misc/vmw_vmci: fix an infoleak in vmci_host_do_receive_datagram() (CVE-2022-49788) * kernel: net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc (CVE-2025-37890) * kernel: mm/huge_memory: fix dereferencing invalid pmd migration entry (CVE-2025-37958) * kernel: net/tipc: fix slab-use-after-free Read in tipc_aead_encrypt_done (CVE-2025-38052) 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-2021-47527 References: https://access.redhat.com/security/updates/classification/#important https://bugzilla.redhat.com/show_bug.cgi?id=2265650 https://bugzilla.redhat.com/show_bug.cgi?id=2272780 https://bugzilla.redhat.com/show_bug.cgi?id=2278169 https://bugzilla.redhat.com/show_bug.cgi?id=2278237 https://bugzilla.redhat.com/show_bug.cgi?id=2278398 https://bugzilla.redhat.com/show_bug.cgi?id=2278537 https://bugzilla.redhat.com/show_bug.cgi?id=2282712 https://bugzilla.redhat.com/show_bug.cgi?id=2282780 https://bugzilla.redhat.com/show_bug.cgi?id=2283424 https://bugzilla.redhat.com/show_bug.cgi?id=2284465 https://bugzilla.redhat.com/show_bug.cgi?id=2307861 https://bugzilla.redhat.com/show_bug.cgi?id=2347899 https://bugzilla.redhat.com/show_bug.cgi?id=2348513 https://bugzilla.redhat.com/show_bug.cgi?id=2348516 https://bugzilla.redhat.com/show_bug.cgi?id=2348599 https://bugzilla.redhat.com/show_bug.cgi?id=2356592 https://bugzilla.redhat.com/show_bug.cgi?id=2356917 https://bugzilla.redhat.com/show_bug.cgi?id=2363378 https://bugzilla.redhat.com/show_bug.cgi?id=2366848 https://bugzilla.redhat.com/show_bug.cgi?id=2367572 https://bugzilla.redhat.com/show_bug.cgi?id=2373380