ALSA-2026:89082: Important: kernel-rt security, bug fix, and enhancement update

Published Oct 24, 2026
·
Updated

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

kernel: tcp: restrict SOATTACHFILTER to priv users (CVE-2026-53236) kernel: fuse: re-lock request before replacing page cache folio (CVE-2026-53388) kernel: writeback: fix race between cgroupwritebackumount() and inodeswitchwbs() (CVE-2026-64378) kernel: net: gro: fix double aggregation of flush-marked skbs (CVE-2026-68136) kernel: net/packet: avoid fanout hook re-registration after unregister (CVE-2026-68338) kernel: net/iucv: fix use-after-free of a severed iucvpath (CVE-2026-68140) kernel: net/sched: serialize qdiscrtablist against concurrent get/put (CVE-2026-68138) kernel: ipvs: reload ip header after head reallocation (CVE-2026-68476) kernel: selinux: avoid sksocket dereference in selinuxsctpbindconnect() (CVE-2026-72242) kernel: mptcp: options: reset DSS fields in case of unexpected size (CVE-2026-80586) kernel: usb: usbfs: fix use-after-free of usbdevice in usbdevrelease() (CVE-2026-80824) kernel: smb: client: clear setuid/setgid bit on write with cifsacl/modefromsid/posix extensions (CVE-2026-89638) kernel: net/iucv: filter frames in afiucvhsrcv() by ingress device (CVE-2026-81003) kernel: ipv4: validate checksumstart before completing checksum (CVE-2026-99999)

Bug Fix(es) and Enhancement(s):

Backport 6785011f8b16 ("ipv4: validate checksumstart before completing checksum") [almalinux-8.10.z] (JIRA:AlmaLinux-280584)

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.

Affected Software

10 affected componentsFixes available
almalinux/kernel-rt<4.18.0-553.178.1.rt7.519.el8_10
4.18.0-553.178.1.rt7.519.el8_10
almalinux/kernel-rt-core<4.18.0-553.178.1.rt7.519.el8_10
4.18.0-553.178.1.rt7.519.el8_10
almalinux/kernel-rt-debug<4.18.0-553.178.1.rt7.519.el8_10
4.18.0-553.178.1.rt7.519.el8_10
almalinux/kernel-rt-debug-core<4.18.0-553.178.1.rt7.519.el8_10
4.18.0-553.178.1.rt7.519.el8_10
almalinux/kernel-rt-debug-devel<4.18.0-553.178.1.rt7.519.el8_10
4.18.0-553.178.1.rt7.519.el8_10
almalinux/kernel-rt-debug-modules<4.18.0-553.178.1.rt7.519.el8_10
4.18.0-553.178.1.rt7.519.el8_10
almalinux/kernel-rt-debug-modules-extra<4.18.0-553.178.1.rt7.519.el8_10
4.18.0-553.178.1.rt7.519.el8_10
almalinux/kernel-rt-devel<4.18.0-553.178.1.rt7.519.el8_10
4.18.0-553.178.1.rt7.519.el8_10
almalinux/kernel-rt-modules<4.18.0-553.178.1.rt7.519.el8_10
4.18.0-553.178.1.rt7.519.el8_10
almalinux/kernel-rt-modules-extra<4.18.0-553.178.1.rt7.519.el8_10
4.18.0-553.178.1.rt7.519.el8_10

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade almalinux/kernel-rt to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.178.1.rt7.519.el8_10
  2. Upgrade

    Upgrade almalinux/kernel-rt-core to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.178.1.rt7.519.el8_10
  3. Upgrade

    Upgrade almalinux/kernel-rt-debug to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.178.1.rt7.519.el8_10
  4. Upgrade

    Upgrade almalinux/kernel-rt-debug-core to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.178.1.rt7.519.el8_10
  5. Upgrade

    Upgrade almalinux/kernel-rt-debug-devel to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.178.1.rt7.519.el8_10
  6. Upgrade

    Upgrade almalinux/kernel-rt-debug-modules to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.178.1.rt7.519.el8_10
  7. Upgrade

    Upgrade almalinux/kernel-rt-debug-modules-extra to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.178.1.rt7.519.el8_10
  8. Upgrade

    Upgrade almalinux/kernel-rt-devel to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.178.1.rt7.519.el8_10
  9. Upgrade

    Upgrade almalinux/kernel-rt-modules to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.178.1.rt7.519.el8_10
  10. Upgrade

    Upgrade almalinux/kernel-rt-modules-extra to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.178.1.rt7.519.el8_10
  11. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch 6785011f8b16
  12. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-53388
  13. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-99999
  14. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-68476
  15. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-80586
  16. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-81003
  17. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-68140
  18. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-68338
  19. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-68138
  20. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-68136
  21. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-72242
  22. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-89638
  23. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-53236
  24. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-80824
  25. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-64378

Event History

Oct 24, 2026
Advisory Published
via OSV·12:00 AM
Data Sourced
via OSV·12:00 AM
DescriptionAffected Software

Child vulnerabilities

Contains the following vulnerabilities.

Company

Resources

Contact

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