Issued at: 2026-09-19
Updated at: 2026-09-20
Advisory content derived from Red Hat RHSA-2026:68570, © 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: Linux kernel t7xx WWAN driver: Denial of Service via buffer overflow (CVE-2026-23172)
* kernel: xfrm: hold dev ref until after transport_finish NF_HOOK (CVE-2026-31663)
* kernel: RDMA/rxe: Fix race condition in QP timer handlers (CVE-2026-45910)
* kernel: RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv (CVE-2026-46043)
* kernel: RDMA/rxe: Reject unknown opcodes before ICRC processing (CVE-2026-46133)
* kernel: RDMA/rxe: Reject non-8-byte ATOMIC_WRITE payloads (CVE-2026-46114)
* kernel: net: ena: PHC: Fix potential use-after-free in get_timestamp (CVE-2026-52971)
* kernel: IB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN (CVE-2026-53176)
* kernel: ALSA: timer: Forcibly close timer instances at closing (CVE-2026-53193)
* kernel: USB: serial: io_ti: fix heap overflow in get_manuf_info() (CVE-2026-53196)
* kernel: xfrm: policy: fix use-after-free on inexact bin in xfrm_policy_bysel_ctx() (CVE-2026-53239)
* kernel: ALSA: timer: Fix UAF at snd_timer_user_params() (CVE-2026-53192)
* kernel: wifi: mac80211: limit injected antenna index in ieee80211_parse_tx_radiotap (CVE-2026-63869)
* kernel: ALSA: seq: Serialize UMP output teardown with event_input (CVE-2026-64029)
* kernel: ip6: vti: Use ip6_tnl.net in vti6_siocdevprivate() (CVE-2026-63921)
* kernel: xfrm: input: hold netns during deferred transport reinjection (CVE-2026-63919)
* kernel: ip6: vti: Use ip6_tnl.net in vti6_changelink() (CVE-2026-63917)
* kernel: netfilter: conntrack: tcp: do not force CLOSE on invalid-seq RST without direction check (CVE-2026-63913)
* kernel: wifi: iwlwifi: mvm: fix driver-set TX rates on old devices (CVE-2026-64176)
* kernel: wifi: cfg80211: advance loop vars in cfg80211_merge_profile() (CVE-2026-64174)
* kernel: wifi: iwlwifi: mld: stop TX during firmware restart (CVE-2026-64175)
* kernel: RDMA/rxe: Fix a use-after-free problem in rxe_mmap (CVE-2026-64582)
* kernel: Linux kernel: libceph stack out-of-bounds write via crafted OSDMap (CVE-2026-68159)
* kernel: Linux kernel: ALSA timer use-after-free vulnerability allows privilege escalation (CVE-2026-68200)
* kernel: Linux kernel (ice): Denial of Service via out-of-range ptype in VIRTCHNL (CVE-2026-68128)
* kernel: Linux kernel: ath9k Wi-Fi driver use-after-free vulnerability leading to system crash (CVE-2026-68363)
* kernel: xfrm: fix stale skb->prev after async crypto steals a GSO segment (CVE-2026-68426)
* kernel: dm_early_create: fix freeing used table on dm_resume failure (CVE-2026-72102)
* kernel: net: qrtr: fix 32-bit integer overflow in qrtr_endpoint_post() (CVE-2026-72298)
* kernel: wifi: brcmfmac: cyw: fix heap overflow on a short auth frame (CVE-2026-72003)
* kernel: selinux: check connect-related permissions on TCP Fast Open (CVE-2026-72243)
Bug Fix(es) and Enhancement(s):
* gfs2: filesystem withdrawal rework [rhel-9.8.z] (JIRA:Rocky Linux-252540)
* The slab cache entries for gfs2 and dlm grow very large for gfs2 filesystems [rhel-9.8.z] (JIRA:Rocky Linux-252544)
* gfs2: Get rid of sd_async_glock_wait [rhel-9.8.z] (JIRA:Rocky Linux-253986)
* [Rocky Linux9.8z] watchdog: System panics during reboot when pretimeout is disabled (0) (JIRA:Rocky Linux-255217)
* [usb/xhci] kdump on Arrow Lake systems hangs system with dracut-initqueue Timed out errors [rhel-9.8.z] (JIRA:Rocky Linux-256733)
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.