RHSA-2026:57253 — Security Advisory

Red Hat Security Advisory: kernel security, bug fix, and enhancement update

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Severity

Important

Red Hat Product Security

RHEL 8

Products

Official CSAF product identity

Published · August 20, 2026

Updated · November 1, 2026

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.

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: ieee802154: do not leave a dangling sk pointer in ieee802154_create() (CVE-2024-56602)
kernel: ip6_gre: Use cached t->net in ip6erspan_changelink() (CVE-2026-46120)
kernel: sched/psi: fix race between file release and pressure write (CVE-2026-52991)
kernel: mm/huge_memory: update file PMD counter before folio_put() (CVE-2026-53189)
kernel: scsi: target: iscsi: Fix CRC overread and double-free in iscsit_handle_text_cmd() (CVE-2026-63888)
kernel: scsi: target: iscsi: Bound iscsi_encode_text_output() appends to rsp_buf (CVE-2026-63887)
kernel: net/smc: reject CHID-0 ACCEPT that matches an empty ism_dev slot (CVE-2026-64048)
kernel: smb: client: mask server-provided mode to 07777 in modefromsid (CVE-2026-64379)
kernel: smb/client: handle overlapping allocated ranges in fallocate (CVE-2026-68388)

Bug Fix(es) and Enhancement(s):

sfc: TX queue stalls and NIC resets caused by GFP_ATOMIC allocation failures after RHEL 8.10 kernel update (JIRA:RHEL-219767)

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.