HIGH 7.4 Microsoft

CVE-2026-3593

Heap use-after-free vulnerability in BIND 9 DNS-over-HTTPS implementation

Microsoft Security Update 2026-May: Heap use-after-free vulnerability in BIND 9 DNS-over-HTTPS implementation

Affected Products

azl3 bind 9.20.21-1 on Azure Linux 3.0

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-3593
https://nvd.nist.gov/vuln/detail/CVE-2026-3593

Published: 2026-05-12 · Source: Microsoft · Feed updated: 2026-08-04

This high severity vulnerability with a CVSS score of 7.4 was published on 2026-05-12 via Microsoft. Affected: azl3 bind 9.20.21-1 on Azure Linux 3.0.

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