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Vulnerabilities

Vulnerability · RLSA-2026:85774

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

Published Oct 21, 2026 · catalog updated Oct 21, 2026 · Important: kernel-rt security, bug

Last checked Oct 21, 2026, 11 days ago.

Open the advisory

Exploitation likelihood is not on this record for RLSA-2026:85774. A missing EPSS score is not a low risk. Compare Important: kernel-rt 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-rt 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-rt

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: xfrm: espintcp: do not reuse an in-progress partial send (CVE-2026-52935) * kernel: USB: serial: io_ti: fix heap overflow in get_manuf_info() (CVE-2026-53196) * kernel: sctp: keep chunk->transport in step with the list it is queued on (CVE-2026-74588) * kernel: sctp: validate cookie AUTH state before use (CVE-2026-74752) * kernel: smb: client: reject a tree connect response whose byte count is too small (CVE-2026-89631) * kernel: sctp: stop processing a packet once its association is deleted (CVE-2026-89479) * kernel: perf: Fix addr_filter_ranges lifetime (CVE-2026-93817) * kernel: netfilter: nfnetlink_log: wait for rcu grace period before freeing pernet state (CVE-2026-93288) * kernel: kernel: strparser: use-after-free via msg_timer_work rearm after strp_done() cancellation () * kernel: netfilter: flowtable: hold reference on ct until flow is released (CVE-2026-98320) Bug Fix(es) and Enhancement(s): * gfs2 filesystem withdrawal rework [Rocky Linux-8] (JIRA:Rocky Linux-129363) * Batch: z-stream xfrm - rhel-8.10.z (NST-Core-26W38) (JIRA:Rocky Linux-256684) 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 kernel-rt0 → 0:4.18.0-553.176.1.rt7.517.el8_10

How to fix RLSA-2026:85774

  • Upgrade

    RLSA-2026:85774 lists a fix boundary at 0:4.18.0-553.176.1.rt7.517.el8_10. Compare the installed build with that boundary before you change production.

  • Version check

    Fixed in 0:4.18.0-553.176.1.rt7.517.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-2026:85774. A missing EPSS score is not a low risk. Compare Important: kernel-rt security, bug with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with 0 → 0:4.18.0-553.176.1.rt7.517.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 21, 2026 · OpenSSF OSV / OSV Scanner

    Detected

    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: xfrm: espintcp: do not reuse an in-progress partial send (CVE-2026-52935) * kernel: USB: serial: io_ti: fix heap overflow in get_manuf_info() (CVE-2026-53196) * kernel: sctp: keep chunk->transport in step with the list it is queu

  2. Oct 21, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    kernel-rt fixed in 0:4.18.0-553.176.1.rt7.517.el8_10

  3. Oct 21, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    kernel-rt fixed in 0:4.18.0-553.176.1.rt7.517.el8_10

  4. Oct 21, 2026 · OpenSSF OSV / OSV Scanner

    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: xfrm: espintcp: do not reuse an in-progress partial send (CVE-2026-52935) * kernel: USB: serial: io_ti: fix heap overflow in get_manuf_info() (CVE-2026-53196) * kernel: sctp: keep chunk->transport in step with the list it is queu

Sources

References

Freshness

Last verified in this catalog Oct 21, 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 21, 2026