Issued at: 2026-10-21
Updated at: 2026-10-21
Advisory content derived from Red Hat RHSA-2026:85321, © Red Hat, Inc., used under CC BY 4.0, with modifications.
Synopsis
Important: kernel security, bug fix, and enhancement update
Description
The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: openvswitch: defer tunnel netdev_put to RCU release (CVE-2026-31678)
* kernel: xfrm: espintcp: do not reuse an in-progress partial send (CVE-2026-52935)
* kernel: sctp: diag: reject stale associations in dump_one path (CVE-2026-52917)
* kernel: tipc: fix slab-use-after-free Read in tipc_aead_decrypt_done (CVE-2026-63801)
* kernel: sctp: fix race between sctp_wait_for_connect and peeloff (CVE-2026-63971)
* kernel: usb: typec: tcpm: bound altmode_desc[] per iteration in svdm_consume_modes() (CVE-2026-63962)
* kernel: sctp: avoid auth_enable sysctl UAF during netns teardown (CVE-2026-68162)
* kernel: tipc: clear sock->sk on the failed-insert path in tipc_sk_create() (CVE-2026-68117)
* kernel: sctp: auth: verify auth requirement when auth_chunk is NULL (CVE-2026-68300)
* kernel: sctp: validate stream count in sctp_process_strreset_inreq() (CVE-2026-68315)
* kernel: Bluetooth: hci_sync: Fix advertising data UAFs (CVE-2026-74509)
* kernel: sctp: keep chunk->transport in step with the list it is queued on (CVE-2026-74588)
* kernel: sctp: validate cookie AUTH state before use (CVE-2026-74752)
* kernel: smb: client: reject a tree connect response whose byte count is too small (CVE-2026-89631)
* kernel: smb: client: fix OOB read/write from unvalidated DataOffset in coalesce_t2() (CVE-2026-89633)
* kernel: signal: Prevent exec() race (CVE-2026-98256)
* kernel: exec: Cleanup POSIX timers right after de_thread() (CVE-2026-98260)
Bug Fix(es) and Enhancement(s):
* [10.2.z] kselftests: mm: hugepage-mremap: Bail out! mremap: Expected failure, but call succeeded (JIRA:Rocky Linux-181987)
* [IBM 10.3 FEAT] zcrypt driver overwrite function - kernel part [rhel-10.2.z] (JIRA:Rocky Linux-245336)
* Batch: z-stream xfrm - rhel-10.2.z (NST-Core-26W38) (JIRA:Rocky Linux-256678)
* RHIVOS - [backport] S32G Driver Enablement - USB (JIRA:Rocky Linux-257228)
* Fix pending kernel issues for L1VH GA - Kernel (JIRA:Rocky Linux-267038)
* Backport 6785011f8b16 ("ipv4: validate checksum_start before completing checksum") [rhel-10.2.z] (JIRA:Rocky Linux-280590)
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.