RHSA-2026:99139HighCVSS 7.8

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

Published
November 11, 2026
Last Modified
November 12, 2026

🔗 CVE IDs covered (18)

CVE-2026-52945 →CVE-2026-64061 →CVE-2026-68451 →CVE-2026-98116 →CVE-2026-64160 →CVE-2026-68452 →CVE-2026-80951 →CVE-2026-98318 →CVE-2026-64541 →CVE-2026-80584 →CVE-2026-80842 →CVE-2026-99153 →CVE-2026-63987 →CVE-2026-80553 →CVE-2026-89956 →CVE-2026-90207 →CVE-2026-98403 →CVE-2026-99152 →

📋 Description

CVE-2026-52945 — kernel: Revert "wireguard: device: enable threaded NAPI" CVE-2026-63987 — kernel: ethtool: coalesce: cap profile updates at NET_DIM_PARAMS_NUM_PROFILES CVE-2026-64061 — kernel: netfs: Fix early put of sink folio in netfs_read_gaps() CVE-2026-64160 — kernel: netfs: Fix potential for tearing in ->remote_i_size and ->zero_point CVE-2026-64541 — kernel: net/smc: fix UAF in smc_cdc_rx_handler() by pinning the socket CVE-2026-68451 — kernel: s390/zcrypt: Validate length for CCA ECC private key requests CVE-2026-68452 — kernel: s390/zcrypt: Validate length for CCA AES cipher key requests CVE-2026-80553 — kernel: s390/vfio_ccw: Cancel existing workqueues CVE-2026-80584 — kernel: s390/qeth: validate user buffer length in SNMP and ARP query ioctls CVE-2026-80842 — kernel: net: bridge: mcast: fix use-after-free of a master VLAN's multicast context CVE-2026-80951 — kernel: i3c: master: svc: bound IBI payload to the requested max_payload_len CVE-2026-89956 — kernel: s390/vfio-ap: Fix missing lock required to access list of ap_matrix_mdev objects CVE-2026-90207 — kernel: ALSA: seq: midi: Serialize input teardown with event_input CVE-2026-98116 — kernel: ALSA: pcm: Serialize PCM mmap with buffer reallocation to fix page UAF CVE-2026-98318 — kernel: smb: client: validate absolute native symlink targets before NT fixups CVE-2026-98403 — kernel: s390/boot: Avoid IPL parameter append past command line CVE-2026-99152 — kernel: kernel: Denial of Service via unvalidated task in iSCSI management responses CVE-2026-99153 — kernel: kernel: Denial of service via unvalidated task tag in iSCSI Reject PDU

🎯 Affected products200

  • Red Hat Enterprise Linux AppStream EUS (v.10.2)
  • Red Hat Enterprise Linux BaseOS EUS (v.10.2)
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v.10.2)
  • Red Hat Enterprise Linux Real Time EUS (v.10.2)
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.10.2)
  • kernel-0:6.12.0-211.75.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.10.2)
  • kernel-0:6.12.0-211.75.1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.10.2)
  • kernel-0:6.12.0-211.75.1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.10.2)
  • kernel-0:6.12.0-211.75.1.el10_2.src as a component of Red Hat Enterprise Linux BaseOS EUS (v.10.2)
  • kernel-0:6.12.0-211.75.1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.10.2)
  • kernel-64k-0:6.12.0-211.75.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.10.2)
  • kernel-64k-core-0:6.12.0-211.75.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.10.2)
  • kernel-64k-debug-0:6.12.0-211.75.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.10.2)
  • kernel-64k-debug-core-0:6.12.0-211.75.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.10.2)
  • kernel-64k-debug-debuginfo-0:6.12.0-211.75.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.10.2)
  • kernel-64k-debug-debuginfo-0:6.12.0-211.75.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.10.2)
  • kernel-64k-debug-debuginfo-0:6.12.0-211.75.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder EUS (v.10.2)
  • kernel-64k-debug-debuginfo-0:6.12.0-211.75.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux Real Time EUS (v.10.2)
  • kernel-64k-debug-devel-0:6.12.0-211.75.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.10.2)
  • kernel-64k-debug-devel-matched-0:6.12.0-211.75.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.10.2)
  • kernel-64k-debug-modules-0:6.12.0-211.75.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.10.2)
  • kernel-64k-debug-modules-core-0:6.12.0-211.75.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.10.2)
  • kernel-64k-debug-modules-extra-0:6.12.0-211.75.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.10.2)
  • kernel-64k-debuginfo-0:6.12.0-211.75.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.10.2)
  • kernel-64k-debuginfo-0:6.12.0-211.75.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.10.2)
  • kernel-64k-debuginfo-0:6.12.0-211.75.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder EUS (v.10.2)
  • kernel-64k-debuginfo-0:6.12.0-211.75.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux Real Time EUS (v.10.2)
  • kernel-64k-devel-0:6.12.0-211.75.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.10.2)
  • kernel-64k-devel-matched-0:6.12.0-211.75.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.10.2)
  • kernel-64k-modules-0:6.12.0-211.75.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.10.2)
  • +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: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. 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 vulnerability, prevent the Silvaco I3C master controller driver module from loading: 1. Blacklist the kernel module: # echo "blacklist svc-i3c-master" >> /etc/modprobe.d/blacklist-svc-i3c-master.conf 2. Configure the module to fail loading if called directly or as a dependency: # echo "install svc-i3c-master /bin/false" >> /etc/modprobe.d/blacklist-svc-i3c-master.conf Caveats: Disabling this module prevents the system from communicating with Silvaco I3C master hardware controllers and attached I3C peripherals. If the module is currently loaded, a system reboot is required to ensure it is completely unloaded from memory. Workaround: To mitigate this vulnerability on systems where audio capabilities are not required, disable the ALSA PCM kernel module (`snd-pcm`). 1. Prevent the module from loading by creating a modprobe configuration file: # echo "install snd-pcm /bin/true" > /etc/modprobe.d/disable-snd-pcm.conf 2. If the module is currently loaded, unload it: # modprobe -r snd-pcm Caveats: Disabling this module prevents audio hardware, playback, and recording from operating. Warning: Unloading the module will interrupt active audio processes. If the module is currently in use and cannot be unloaded, a system restart is required for the configuration to take effect.

🔗 References (22)