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Δ / VULNERABILITY RECORD

CVE-2026-23398.

Source-reported disclosure and enrichment record.

SEVERITY / CVSSMEDIUM / 6.5No severity score in this snapshot.
EXPLOITATION STATUSNot listed in the cached KEV catalogThis does not establish absence of exploitation.
RECORD STATUSMicrosoft vendor recordModified Sep 04, 2026

Disclosure summary

icmp: fix NULL pointer dereference in icmp_tag_validation()

Source-specific records & product guidance

Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.

Microsoft Security Updates (CVRF) · 2026-Mar

Open original source · Updated Sep 04, 2026

icmp: fix NULL pointer dereference in icmp_tag_validation()

Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.

Microsoft maximum product score: 6.5

VendorProduct / associationVersion / bounds
Microsoft update guideazl3 kernel 6.6.126.1-1 on Azure Linux 3.0 (MSRC status code 3)
Microsoft update guidecbl2 kernel 5.15.202.1-1 on CBL Mariner 2.0 (MSRC status code 3)
Microsoft update guidecbl2 kernel 5.15.202.1-1 on CBL-Mariner 2.0 (MSRC status code 3)

Vendor remediation references

  • CBL-Mariner Releases · build 6.6.130.1-1 · product IDs 20956-17084
  • Vendor guidance · product IDs 20956-17084
  • Vendor guidance · product IDs 21093-21692
  • Vendor guidance · product IDs 21093-21692

Original records & references

PUBLISHED 2026-03-26T21:03:21-04:00
MODIFIED 2026-09-04T22:19:19-04:00
INGESTED 2026-10-08T12:45:09-04:00