RHSA-2026:63129HighCVSS 8.8

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

Published
September 4, 2026
Last Modified
September 9, 2026

🔗 CVE IDs covered (27)

CVE-2026-64490 →CVE-2026-72069 →CVE-2025-71147 →CVE-2026-53073 →CVE-2026-63800 →CVE-2026-63824 →CVE-2026-64387 →CVE-2026-64438 →CVE-2026-68145 →CVE-2026-68166 →CVE-2026-53397 →CVE-2026-68480 →CVE-2026-72130 →CVE-2026-63887 →CVE-2026-46185 →CVE-2026-53392 →CVE-2026-53399 →CVE-2026-63886 →CVE-2026-64002 →CVE-2026-64018 →CVE-2026-64268 →CVE-2025-40064 →CVE-2026-45970 →CVE-2026-53391 →CVE-2026-63808 →CVE-2026-64298 →CVE-2026-64304 →

📋 Description

CVE-2025-40064 — kernel: smc: Fix use-after-free in __pnet_find_base_ndev() CVE-2025-71147 — kernel: Linux kernel: Denial of Service due to memory leak in tpm2_load_cmd CVE-2026-45970 — kernel: bonding: alb: fix UAF in rlb_arp_recv during bond up/down CVE-2026-46185 — kernel: smb/client: fix out-of-bounds read in symlink_data() CVE-2026-53073 — kernel: Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error CVE-2026-53391 — kernel: NFSv4/pNFS: reject zero-length r_addr in nfs4_decode_mp_ds_addr CVE-2026-53392 — kernel: NFSv4/flexfiles: reject zero filehandle version count CVE-2026-53397 — kernel: nfsd: fix posix_acl leak on SETACL decode failure CVE-2026-53399 — kernel: nfsd: release layout stid on setlease failure CVE-2026-63800 — kernel: pNFS: Fix use-after-free in pnfs_update_layout() CVE-2026-63808 — kernel: exfat: fix potential use-after-free in exfat_find_dir_entry() CVE-2026-63824 — kernel: KEYS: fix overflow in keyctl_pkey_params_get_2() CVE-2026-63886 — kernel: scsi: target: iscsi: Validate CHAP_R length before base64 decode CVE-2026-63887 — kernel: scsi: target: iscsi: Bound iscsi_encode_text_output() appends to rsp_buf CVE-2026-64002 — kernel: ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table() CVE-2026-64018 — kernel: net: mana: validate rx_req_idx to prevent out-of-bounds array access CVE-2026-64268 — kernel: Kernel: Remote out-of-bounds write in RDMA/siw CVE-2026-64298 — kernel: NFSv4: include MAY_WRITE in open permission mask for O_TRUNC CVE-2026-64304 — kernel: crypto: qat - validate RSA CRT component lengths CVE-2026-64387 — kernel: smb: client: fix query directory replay double-free CVE-2026-64438 — kernel: crypto: qat - fix VF2PF work teardown race in adf_disable_sriov() CVE-2026-64490 — kernel: ALSA: virtio: Validate control metadata from the device CVE-2026-68145 — kernel: iomap: fix out-of-bounds bitmap_set() with zero-length range CVE-2026-68166 — kernel: Linux kernel: Arbitrary code execution via userfaultfd shadow stack manipulation CVE-2026-68480 — kernel: AMD-SN-7061: Safe RET Interrupt Vulnerability CVE-2026-72069 — kernel: locking/rt: Fix the incorrect RCU protection in rt_spin_unlock() CVE-2026-72130 — kernel: nvmet-auth: reject short AUTH_RECEIVE buffers

🎯 Affected products200

  • Red Hat Enterprise Linux AppStream (v. 9)
  • Red Hat Enterprise Linux BaseOS (v. 9)
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • Red Hat Enterprise Linux Real Time (v. 9)
  • Red Hat Enterprise Linux Real Time for NFV (v. 9)
  • kernel-0:5.14.0-687.44.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-0:5.14.0-687.44.1.el9_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-0:5.14.0-687.44.1.el9_8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-0:5.14.0-687.44.1.el9_8.src as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-0:5.14.0-687.44.1.el9_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-0:5.14.0-687.44.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-core-0:5.14.0-687.44.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-0:5.14.0-687.44.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-core-0:5.14.0-687.44.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-debuginfo-0:5.14.0-687.44.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-debug-debuginfo-0:5.14.0-687.44.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-debuginfo-0:5.14.0-687.44.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • kernel-64k-debug-debuginfo-0:5.14.0-687.44.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux Real Time (v. 9)
  • kernel-64k-debug-devel-0:5.14.0-687.44.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-debug-devel-matched-0:5.14.0-687.44.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-debug-modules-0:5.14.0-687.44.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-modules-core-0:5.14.0-687.44.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-modules-extra-0:5.14.0-687.44.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debuginfo-0:5.14.0-687.44.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-debuginfo-0:5.14.0-687.44.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debuginfo-0:5.14.0-687.44.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • kernel-64k-debuginfo-0:5.14.0-687.44.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux Real Time (v. 9)
  • kernel-64k-devel-0:5.14.0-687.44.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-devel-matched-0:5.14.0-687.44.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-modules-0:5.14.0-687.44.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • +170 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture. Because of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat's CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available. Workaround: To mitigate this issue, prevent the `siw` kernel module from loading. Create a file `/etc/modprobe.d/blacklist-siw.conf` with the following content: ``` blacklist siw install siw /bin/true ``` After creating the file, regenerate the initramfs and reboot the system for the changes to take effect: ```bash dracut -f -v reboot ``` This mitigation will disable the Soft iWARP functionality, which may impact applications relying on it. A system reboot is required for the changes to be fully applied. Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability. Workaround: To mitigate this issue, ensure that in-band DH-HMAC-CHAP authentication is not configured on NVMe-oF targets if it is not strictly required. This vulnerability is only exploitable when this specific authentication mechanism is enabled. Consult NVMe-oF documentation for your specific setup to disable DH-HMAC-CHAP authentication if it is currently enabled and not required.

🔗 References (30)