RHSA-2026:93436: Important: kernel security update

Published Nov 2, 2026
·
Updated

The kernel packages contain the Linux kernel, the core of any Linux operating system.Security Fix(es): kernel: ipv6: exthdrs: refresh nh pointer after ipv6hopjumbo() (CVE-2026-63924) kernel: ipv6: exthdrs: refresh nh after handling HAO option (CVE-2026-63922) kernel: afunix: Fix UAF read of tail->len in unixstreamdatawait() (CVE-2026-64109) kernel: scsi: target: core: Fix iSCSI ISID use-after-free in REGISTER AND MOVE (CVE-2026-72083) kernel: tipc: require net admin for TIPCv2 netlink mutators (CVE-2026-74283) kernel: smb: client: bound dirent name against end of SMB response in cifsfilldir (CVE-2026-93787) kernel: ZDI-CAN-33367: Linux Kernel skbuff skbzerocopy Improper Ownership Management Local Privilege Escalation Vulnerability () 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

105 affected componentsFixes available
redhat/kernel<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/bpftool<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/bpftool-debuginfo<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-abi-stablelists<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-core<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-cross-headers<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-debug<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-debug-core<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-debug-debuginfo<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-debug-devel<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-debug-modules<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-debug-modules-extra<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-debuginfo<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-devel<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-doc<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-headers<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-modules<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-modules-extra<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-tools<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-tools-debuginfo<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-tools-libs<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/perf<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/perf-debuginfo<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/python3-perf<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/python3-perf-debuginfo<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/bpftool<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/bpftool-debuginfo<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-core<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-cross-headers<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-debug<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-debug-core<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-debug-debuginfo<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-debug-devel<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-debug-modules<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-debug-modules-extra<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-debuginfo<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-debuginfo-common-s390x<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-devel<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-headers<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-modules<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-modules-extra<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-tools<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-tools-debuginfo<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-zfcpdump<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-zfcpdump-core<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-zfcpdump-debuginfo<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-zfcpdump-devel<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-zfcpdump-modules<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-zfcpdump-modules-extra<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/perf<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/perf-debuginfo<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/python3-perf<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/python3-perf-debuginfo<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/bpftool<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/bpftool-debuginfo<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-core<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-cross-headers<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-debug<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-debug-core<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-debug-debuginfo<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-debug-devel<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-debug-modules<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-debug-modules-extra<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-debuginfo<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-debuginfo-common-ppc64le<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-devel<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-headers<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-modules<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-modules-extra<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-tools<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-tools-debuginfo<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-tools-libs<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/perf<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/perf-debuginfo<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/python3-perf<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/python3-perf-debuginfo<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/bpftool<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/bpftool-debuginfo<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/kernel<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/kernel-core<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/kernel-cross-headers<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/kernel-debug<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/kernel-debug-core<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/kernel-debug-debuginfo<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/kernel-debug-devel<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/kernel-debug-modules<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/kernel-debug-modules-extra<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/kernel-debuginfo<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/kernel-debuginfo-common-aarch64<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/kernel-devel<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/kernel-headers<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/kernel-modules<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/kernel-modules-extra<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/kernel-tools<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/kernel-tools-debuginfo<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/kernel-tools-libs<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/perf<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/perf-debuginfo<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/python3-perf<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/python3-perf-debuginfo<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa
redhat/kernel-tools-libs-devel<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-tools-libs-devel<4.18.0-553.181.1.el8_10
4.18.0-553.181.1.el8_10
redhat/kernel-tools-libs-devel<4.18.0-553.181.1.el8_10.aa
4.18.0-553.181.1.el8_10.aa

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  2. Upgrade

    Upgrade redhat/bpftool to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  3. Upgrade

    Upgrade redhat/bpftool-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  4. Upgrade

    Upgrade redhat/kernel-abi-stablelists to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  5. Upgrade

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

    Fixed in 4.18.0-553.181.1.el8_10
  6. Upgrade

    Upgrade redhat/kernel-cross-headers to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  7. Upgrade

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

    Fixed in 4.18.0-553.181.1.el8_10
  8. Upgrade

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

    Fixed in 4.18.0-553.181.1.el8_10
  9. Upgrade

    Upgrade redhat/kernel-debug-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  10. Upgrade

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

    Fixed in 4.18.0-553.181.1.el8_10
  11. Upgrade

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

    Fixed in 4.18.0-553.181.1.el8_10
  12. Upgrade

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

    Fixed in 4.18.0-553.181.1.el8_10
  13. Upgrade

    Upgrade redhat/kernel-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  14. Upgrade

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

    Fixed in 4.18.0-553.181.1.el8_10
  15. Upgrade

    Upgrade redhat/kernel-doc to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  16. Upgrade

    Upgrade redhat/kernel-headers to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  17. Upgrade

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

    Fixed in 4.18.0-553.181.1.el8_10
  18. Upgrade

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

    Fixed in 4.18.0-553.181.1.el8_10
  19. Upgrade

    Upgrade redhat/kernel-tools to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  20. Upgrade

    Upgrade redhat/kernel-tools-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  21. Upgrade

    Upgrade redhat/kernel-tools-libs to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  22. Upgrade

    Upgrade redhat/perf to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  23. Upgrade

    Upgrade redhat/perf-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  24. Upgrade

    Upgrade redhat/python3-perf to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  25. Upgrade

    Upgrade redhat/python3-perf-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  26. Upgrade

    Upgrade redhat/kernel-debuginfo-common-s390x to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  27. Upgrade

    Upgrade redhat/kernel-zfcpdump to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  28. Upgrade

    Upgrade redhat/kernel-zfcpdump-core to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  29. Upgrade

    Upgrade redhat/kernel-zfcpdump-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  30. Upgrade

    Upgrade redhat/kernel-zfcpdump-devel to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  31. Upgrade

    Upgrade redhat/kernel-zfcpdump-modules to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  32. Upgrade

    Upgrade redhat/kernel-zfcpdump-modules-extra to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  33. Upgrade

    Upgrade redhat/kernel-debuginfo-common-ppc64le to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  34. Upgrade

    Upgrade redhat/bpftool to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10.aa
  35. Upgrade

    Upgrade redhat/bpftool-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10.aa
  36. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10.aa
  37. Upgrade

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

    Fixed in 4.18.0-553.181.1.el8_10.aa
  38. Upgrade

    Upgrade redhat/kernel-cross-headers to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10.aa
  39. Upgrade

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

    Fixed in 4.18.0-553.181.1.el8_10.aa
  40. Upgrade

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

    Fixed in 4.18.0-553.181.1.el8_10.aa
  41. Upgrade

    Upgrade redhat/kernel-debug-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10.aa
  42. Upgrade

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

    Fixed in 4.18.0-553.181.1.el8_10.aa
  43. Upgrade

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

    Fixed in 4.18.0-553.181.1.el8_10.aa
  44. Upgrade

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

    Fixed in 4.18.0-553.181.1.el8_10.aa
  45. Upgrade

    Upgrade redhat/kernel-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10.aa
  46. Upgrade

    Upgrade redhat/kernel-debuginfo-common-aarch64 to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10.aa
  47. Upgrade

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

    Fixed in 4.18.0-553.181.1.el8_10.aa
  48. Upgrade

    Upgrade redhat/kernel-headers to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10.aa
  49. Upgrade

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

    Fixed in 4.18.0-553.181.1.el8_10.aa
  50. Upgrade

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

    Fixed in 4.18.0-553.181.1.el8_10.aa
  51. Upgrade

    Upgrade redhat/kernel-tools to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10.aa
  52. Upgrade

    Upgrade redhat/kernel-tools-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10.aa
  53. Upgrade

    Upgrade redhat/kernel-tools-libs to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10.aa
  54. Upgrade

    Upgrade redhat/perf to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10.aa
  55. Upgrade

    Upgrade redhat/perf-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10.aa
  56. Upgrade

    Upgrade redhat/python3-perf to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10.aa
  57. Upgrade

    Upgrade redhat/python3-perf-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10.aa
  58. Upgrade

    Upgrade redhat/kernel-tools-libs-devel to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10
  59. Upgrade

    Upgrade redhat/kernel-tools-libs-devel to a version that resolves this vulnerability.

    Fixed in 4.18.0-553.181.1.el8_10.aa
  60. Operational

    Reboot the system for the kernel update to take effect.

Event History

Nov 2, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software

Frequently Asked Questions

1

What level of access is required for the TIPCv2 netlink issue?

The fix requires network administration privileges for TIPCv2 netlink mutator operations, indicating that NET_ADMIN-level capability is relevant to this issue.

2

Which listed issue is identified as a local privilege-escalation vulnerability?

The advisory identifies the Linux kernel skbuff skb_zerocopy improper ownership management issue, tracked as ZDI-CAN-33367, as a local privilege-escalation vulnerability.

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