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VulnerabilityPublished

CVE-2026-74515: kernel-rt security update

Affects Linux kernelSource GCVE Database

0

Not known to be exploited : upgrade to 4.18.0-553.179.1.rt7.520.el8_10 when convenient.

Data as of 26 Oct 2026, 17:16 UTC

Severity
Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS
0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 4.18.0-553.179.1.rt7.520.el8_10

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 26 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade the AlmaLinux to 4.18.0-553.179.1.rt7.520.el8_10.

Affected software

ProductAffectedFixed in
AlmaLinux 8kernel-rtAffected
  • <4.18.0-553.179.1.rt7.520.el8_10
Fixed in
  • 4.18.0-553.179.1.rt7.520.el8_10
AlmaLinux 8kernel-rt-coreAffected
  • <4.18.0-553.179.1.rt7.520.el8_10
Fixed in
  • 4.18.0-553.179.1.rt7.520.el8_10
AlmaLinux 8kernel-rt-debugAffected
  • <4.18.0-553.179.1.rt7.520.el8_10
Fixed in
  • 4.18.0-553.179.1.rt7.520.el8_10
AlmaLinux 8kernel-rt-debug-coreAffected
  • <4.18.0-553.179.1.rt7.520.el8_10
Fixed in
  • 4.18.0-553.179.1.rt7.520.el8_10
AlmaLinux 8kernel-rt-debug-develAffected
  • <4.18.0-553.179.1.rt7.520.el8_10
Fixed in
  • 4.18.0-553.179.1.rt7.520.el8_10
AlmaLinux 8kernel-rt-debug-modulesAffected
  • <4.18.0-553.179.1.rt7.520.el8_10
Fixed in
  • 4.18.0-553.179.1.rt7.520.el8_10

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

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: KVM: s390: pci: Reject adapter interrupt forwarding if already enabled (CVE-2026-74515) 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.

References

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