AZL-80987

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Import Source

https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-80987.json

JSON Data

https://api.osv.dev/v1/vulns/AZL-80987

Upstream

CVE-2026-3591

Published

2026-03-25T14:16:37Z

Modified

2026-08-28T17:47:33Z

Summary

CVE-2026-3591 affecting package bind for versions less than 9.20.21-1

Details

A use-after-return vulnerability exists in the named server when handling DNS queries signed with SIG(0). Using a specially-crafted DNS request, an attacker may be able to cause an ACL to improperly (mis)match an IP address. In a default-allow ACL (denying only specific IP addresses), this may lead to unauthorized access. Default-deny ACLs should fail-secure. This issue affects BIND 9 versions 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, and 9.20.9-S1 through 9.20.20-S1. BIND 9 versions 9.18.0 through 9.18.46 and 9.18.11-S1 through 9.18.46-S1 are NOT affected.

References

https://nvd.nist.gov/vuln/detail/CVE-2026-3591

Affected packages

Azure Linux:3 / bind

Package

Name: bind
Purl: pkg:rpm/azure-linux/bind

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

9.20.21-1

Database specific

source

"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-80987.json"