AZL-101709

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Import Source
https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-101709.json
JSON Data
https://api.test.osv.dev/v1/vulns/AZL-101709
Upstream
Published
2026-09-16T09:17:06Z
Modified
2026-09-23T14:15:49Z
Summary
CVE-2026-81642 affecting package unbound for versions less than 1.26.1-1
Details

In NLnet Labs Unbound up to and including 1.26.0, a vulnerability was found in the DNSSEC validator that enables denial of service and possible remote code execution as a result of digesting DNSKEYs. A DNSKEY with an owner compression pointer to its own RDATA can overflow the digest buffer. Remote code execution is possible through attacker controlled data. An adversary can exploit the vulnerability by controlling a malicious zone and querying a vulnerable Unbound.

References

Affected packages

Azure Linux:3 / unbound

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.26.1-1

Database specific

source
"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-101709.json"