DEBIAN-CVE-2026-69184

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Source

https://security-tracker.debian.org/tracker/CVE-2026-69184

Import Source

https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-69184.json

JSON Data

https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-69184

Upstream

CVE-2026-69184

Published

2026-09-18T18:17:11Z

Modified

2026-09-19T05:00:12Z

Severity

7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator

Summary

[none]

Details

c-ares is an asynchronous resolver library. Prior to 1.34.7, ares_dns_name_parse() enforces backward DNS compression pointers but does not bound the total pointer hops or assembled name length. A malicious DNS server can send a response containing a long descending pointer chain and many resource records whose NAME or RDATA fields refer to the chain, causing repeated decompression work that grows quadratically with message size. A single crafted response can stall the single-threaded c-ares event loop and deny DNS resolution, without causing memory corruption or information disclosure. This issue is fixed in version 1.34.7.

References

https://security-tracker.debian.org/tracker/CVE-2026-69184

Affected packages

Debian:13 / c-ares

Package

Name: c-ares
Purl: pkg:deb/debian/c-ares?arch=source&distro=trixie

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.34.5-1

1.34.5-1+deb13u1

1.34.6-1

1.34.7-1

1.34.8-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-69184.json"

Debian:14 / c-ares