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Vulnerabilities

Vulnerability · RLSA-2026:89083

Important: kernel security, bug fix, and enhancement update

Published Oct 26, 2026 · catalog updated Oct 26, 2026 · Important: kernel security, bug

Last checked Oct 26, 2026. A connected source was read within the last 7 days.

Open the advisory

Exploitation likelihood is not on this record for RLSA-2026:89083. A missing EPSS score is not a low risk. Compare Important: kernel security, bug with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Important: kernel security, bug).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Advisory link
Affected products
Rocky Linux:8 kernel

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: tcp: restrict SO_ATTACH_FILTER to priv users (CVE-2026-53236) * kernel: fuse: re-lock request before replacing page cache folio (CVE-2026-53388) * kernel: writeback: fix race between cgroup_writeback_umount() and inode_switch_wbs() (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 iucv_path (CVE-2026-68140) * kernel: net/sched: serialize qdisc_rtab_list against concurrent get/put (CVE-2026-68138) * kernel: ipvs: reload ip header after head reallocation (CVE-2026-68476) * kernel: mptcp: options: reset DSS fields in case of unexpected size (CVE-2026-80586) * kernel: usb: usbfs: fix use-after-free of usb_device in usbdev_release() (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 afiucv_hs_rcv() by ingress device (CVE-2026-81003) * kernel: ipv4: validate checksum_start before completing checksum (CVE-2026-99999) Bug Fix(es) and Enhancement(s): * Backport 6785011f8b16 ("ipv4: validate checksum_start before completing checksum") [rhel-8.10.z] (JIRA:Rocky Linux-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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Rocky Linux:8 kernel0 → 0:4.18.0-553.178.1.el8_10

How to fix RLSA-2026:89083

  • Upgrade

    RLSA-2026:89083 lists a fix boundary at 0:4.18.0-553.178.1.el8_10. Compare the installed build with that boundary before you change production.

  • Version check

    Fixed in 0:4.18.0-553.178.1.el8_10

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for RLSA-2026:89083. A missing EPSS score is not a low risk. Compare Important: kernel security, bug with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with 0 → 0:4.18.0-553.178.1.el8_10. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Atlassian Jira security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 26, 2026 · OpenSSF OSV / OSV Scanner

    Detected

    The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: tcp: restrict SO_ATTACH_FILTER to priv users (CVE-2026-53236) * kernel: fuse: re-lock request before replacing page cache folio (CVE-2026-53388) * kernel: writeback: fix race between cgroup_writeback_umount() and inode_switch_wbs() (CVE-2026-64378) * kernel: net: gro: fix double aggreg

  2. Oct 26, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    kernel fixed in 0:4.18.0-553.178.1.el8_10

  3. Oct 26, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    kernel fixed in 0:4.18.0-553.178.1.el8_10

  4. Oct 26, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: tcp: restrict SO_ATTACH_FILTER to priv users (CVE-2026-53236) * kernel: fuse: re-lock request before replacing page cache folio (CVE-2026-53388) * kernel: writeback: fix race between cgroup_writeback_umount() and inode_switch_wbs() (CVE-2026-64378) * kernel: net: gro: fix double aggreg

Sources

References

Freshness

Last verified in this catalog Oct 26, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • OpenSSF OSV / OSV ScannerOct 26, 2026