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Vulnerabilities

Vulnerability · USN-8921-1

linux, linux-aws, linux-aws-fips, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-azure-fips, linux-fips, linux-gcp, linux-gcp-4.15, linux-gcp-fips, linux-hwe, linux-kvm vulner

Published Oct 13, 2026 · catalog updated Oct 13, 2026 · linux, linux-aws, linux-aws-fips, linux-aws-hwe,

Open the advisory

Exploitation likelihood is not on this record for USN-8921-1. A missing EPSS score is not a low risk. Compare linux, linux-aws, linux-aws-fips, linux-aws-hwe, 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 (linux, linux-aws, linux-aws-fips, linux-aws-hwe,).
  • 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
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Advisory link
Affected products
Ubuntu:Pro:14.04:LTS linux-azure · Ubuntu:Pro:16.04:LTS linux-aws-hwe · Ubuntu:Pro:16.04:LTS linux-gcp · Ubuntu:Pro:16.04:LTS linux-hwe · Ubuntu:Pro:18.04:LTS linux · Ubuntu:Pro:18.04:LTS linux-aws

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - S390 architecture; - IIO ADC drivers; - Multiple devices driver; - PCI subsystem; - VFIO drivers; - Network file system (NFS) server daemon; - Overlay file system; (CVE-2024-53194, CVE-2024-53214, CVE-2024-56570, CVE-2024-56779, CVE-2024-57849, CVE-2024-57904, CVE-2024-57929, CVE-2025-21664)

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.

  • Ubuntu:Pro:14.04:LTS linux-azure0 → 4.15.0-1208.223~14.04.1
  • Ubuntu:Pro:16.04:LTS linux-aws-hwe0 → 4.15.0-1198.211~16.04.1
  • Ubuntu:Pro:16.04:LTS linux-gcp0 → 4.15.0-1191.208~16.04.1
  • Ubuntu:Pro:16.04:LTS linux-hwe0 → 4.15.0-261.273~16.04.1
  • Ubuntu:Pro:18.04:LTS linux0 → 4.15.0-261.273
  • Ubuntu:Pro:18.04:LTS linux-aws0 → 4.15.0-1198.211
  • Ubuntu:Pro:18.04:LTS linux-azure-4.150 → 4.15.0-1208.223
  • Ubuntu:Pro:18.04:LTS linux-gcp-4.150 → 4.15.0-1191.208
  • Ubuntu:Pro:18.04:LTS linux-kvm0 → 4.15.0-1180.185
  • Ubuntu:Pro:FIPS-updates:18.04:LTS linux-aws-fips0 → 4.15.0-2136.142
  • Ubuntu:Pro:FIPS-updates:18.04:LTS linux-azure-fips0 → 4.15.0-2116.122
  • Ubuntu:Pro:FIPS-updates:18.04:LTS linux-fips0 → 4.15.0-1153.165

How to fix USN-8921-1

  • Recommended remediation

    A patch or advisory reference is linked. Open the original publisher for availability by product version.

  • 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 USN-8921-1. A missing EPSS score is not a low risk. Compare linux, linux-aws, linux-aws-fips, linux-aws-hwe, with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with 0 → 4.15.0-1208.223~14.04.1, 0 → 4.15.0-1198.211~16.04.1, 0 → 4.15.0-1191.208~16.04.1, 0 → 4.15.0-261.273~16.04.1, 0 → 4.15.0-261.273, 0 → 4.15.0-1198.211. 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

Ubuntu 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 13, 2026 · Catalog

    Detected

    Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - S390 architecture; - IIO ADC drivers; - Multiple devices driver; - PCI subsystem; - VFIO drivers; - Network file system (NFS) server daemon; - Overlay file system; (CVE-2024-53194, CVE-2024-53214, CVE-2024-56570, CVE-2

  2. Oct 13, 2026 · Catalog

    Fix available

    Ubuntu:Pro:14.04:LTS linux-azure 0 → 4.15.0-1208.223~14.04.1

  3. Oct 13, 2026 · Catalog

    Fix available

    Ubuntu:Pro:16.04:LTS linux-aws-hwe 0 → 4.15.0-1198.211~16.04.1

  4. Oct 13, 2026 · Catalog

    Fix available

    Ubuntu:Pro:16.04:LTS linux-gcp 0 → 4.15.0-1191.208~16.04.1

  5. Oct 13, 2026 · Catalog

    Fix available

    Ubuntu:Pro:16.04:LTS linux-hwe 0 → 4.15.0-261.273~16.04.1

  6. Oct 13, 2026 · Catalog

    Fix available

    Ubuntu:Pro:18.04:LTS linux 0 → 4.15.0-261.273

  7. Oct 13, 2026 · Catalog

    Fix available

    Ubuntu:Pro:18.04:LTS linux-aws 0 → 4.15.0-1198.211

  8. Oct 13, 2026 · Catalog

    Fix available

    Ubuntu:Pro:18.04:LTS linux-azure-4.15 0 → 4.15.0-1208.223

  9. Oct 13, 2026 · Catalog

    Fix available

    Ubuntu:Pro:18.04:LTS linux-gcp-4.15 0 → 4.15.0-1191.208

  10. Oct 13, 2026 · Catalog

    Fix available

    Ubuntu:Pro:18.04:LTS linux-kvm 0 → 4.15.0-1180.185

  11. Oct 13, 2026 · Catalog

    Fix available

    Ubuntu:Pro:FIPS-updates:18.04:LTS linux-aws-fips 0 → 4.15.0-2136.142

  12. Oct 13, 2026 · Catalog

    Fix available

    Ubuntu:Pro:FIPS-updates:18.04:LTS linux-azure-fips 0 → 4.15.0-2116.122

  13. Oct 13, 2026 · Catalog

    Fix available

    Ubuntu:Pro:FIPS-updates:18.04:LTS linux-fips 0 → 4.15.0-1153.165

  14. Oct 13, 2026 · Catalog

    Updated

    Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - S390 architecture; - IIO ADC drivers; - Multiple devices driver; - PCI subsystem; - VFIO drivers; - Network file system (NFS) server daemon; - Overlay file system; (CVE-2024-53194, CVE-2024-53214, CVE-2024-56570, CVE-2

Sources

  • OpenSSF OSV / OSV ScannerPackage advisoryUSN-8921-1

    linux, linux-aws, linux-aws-fips, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-azure-fips, linux-fips, linux-gcp, linux-gcp-4.15, linux-gcp-fips, linux-hwe, linux-kvm vulnerabilities

    osv.dev

References

Freshness

Last verified in this catalog Oct 13, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.