RHSA-2026:65710 — Security Advisory

An update for kernel is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.

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.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: dm btree remove: fix use after free in rebalance_children() (CVE-2021-47600)

• kernel: netfilter: nf_tables: don't skip expired elements during walk (CVE-2023-52924)

• kernel: net: atm: fix crash due to unvalidated vcc pointer in sigd_send() (CVE-2026-31411)

• kernel: ip6_gre: Use cached t->net in ip6erspan_changelink() (CVE-2026-46120)

• kernel: crypto: ccp - copy IV using skcipher ivsize (CVE-2026-53016)

• kernel: ipv6: fix possible UAF in icmpv6_rcv() (CVE-2026-53006)

• kernel: Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp (CVE-2026-53071)

• kernel: USB: serial: io_ti: fix heap overflow in get_manuf_info() (CVE-2026-53196)

• kernel: i2c: stub: Reject I2C block transfers with invalid length (CVE-2026-64191)

• kernel: Kernel: Remote out-of-bounds write in RDMA/siw (CVE-2026-64268)

• kernel: can:bcm: arbitrary kernel code execution leading to escalate privileges (CVE-2026-17523)

• kernel: packet: use consistent hard_header_len in non-ring send paths ()

Bug Fix(es) and Enhancement(s):

• vhost: reset the vring metadata cache on vring reconfiguration (JIRA:RHEL-224603)

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.