CVE-2025-68276

Publication date 12 January 2026

Last updated 19 January 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.5 · Medium

Score breakdown

Description

Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. In 0.9-rc2 and earlier, an unprivileged local users can crash avahi-daemon (with wide-area disabled) by creating record browsers with the AVAHI_LOOKUP_USE_WIDE_AREA flag set via D-Bus. This can be done by either calling the RecordBrowserNew method directly or creating hostname/address/service resolvers/browsers that create those browsers internally themselves.

Read the notes from the security team

Status

Package Ubuntu Release Status
avahi 25.10 questing
Fixed 0.8-16ubuntu3.1
25.04 plucky Ignored end of life, was needs-triage
24.04 LTS noble
Fixed 0.8-13ubuntu6.1
22.04 LTS jammy
Fixed 0.8-5ubuntu5.4
20.04 LTS focal
Fixed 0.7-4ubuntu7.3+esm1
18.04 LTS bionic
Fixed 0.7-3.1ubuntu1.3+esm3
16.04 LTS xenial
Fixed 0.6.32~rc+dfsg-1ubuntu2.3+esm4
14.04 LTS trusty
Fixed 0.6.31-4ubuntu1.3+esm4

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Notes

hlibk

The referenced commit in the CVE is not correct.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
avahi

Severity score breakdown

Parameter Value
Base score 5.5 · Medium
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-7967-1
    • Avahi vulnerabilities
    • 19 January 2026

Other references