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Δ / VULNERABILITY RECORD

CVE-2026-63075.

Source-reported disclosure and enrichment record.

SEVERITY / CVSSHIGH / 7.5No severity score in this snapshot.
EXPLOITATION STATUSNot listed in the cached KEV catalogThis does not establish absence of exploitation.
RECORD STATUSMicrosoft vendor recordModified Sep 12, 2026

Disclosure summary

QUIC ACK-only Packet Retention Can Cause Memory Exhaustion

Source-reported weakness categories

CWE-770

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-Aug

Open original source · Updated Sep 12, 2026

QUIC ACK-only Packet Retention Can Cause Memory Exhaustion

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

Microsoft maximum product score: 7.5

VendorProduct / associationVersion / bounds
Microsoft update guideazl3 rust 1.75.0-30 on Azure Linux 3.0 (MSRC status code 3)
Microsoft update guideazl3 rust 1.90.0-10 on Azure Linux 3.0 (MSRC status code 3)
Microsoft update guideazl3 cloud-hypervisor 51.1.101-2 on Azure Linux 3.0 (MSRC status code 3)
Microsoft update guideazl3 kata-containers 3.32.0.kata0-2 on Azure Linux 3.0 (MSRC status code 3)
Microsoft update guideazl3 openssl 3.3.7-4 on Azure Linux 3.0 (MSRC status code 3)
Microsoft update guideazl3 openssl 3.3.7-6 on Azure Linux 3.0 (MSRC status code 3)

Vendor remediation references

  • Vendor guidance · build 3.3.7-6 · product IDs 21819-17084
  • Vendor guidance · product IDs 21819-17084

Original records & references

PUBLISHED 2026-08-26T21:11:03-04:00
MODIFIED 2026-09-12T21:50:21-04:00
INGESTED 2026-10-08T12:35:14-04:00