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01 Record

CVE-2021-3468

A flaw was found in avahi in versions 0.6 up to 0.8. The event used to signal the termination of the client connection on the avahi Unix socket is not correctly handled in the client_work function,

UnratedPUBLISHEDCNA: redhat
CNA base scoreUnratedNo CNA CVSS vector
View raw JSON

02 Description

A flaw was found in avahi in versions 0.6 up to 0.8. The event used to signal the termination of the client connection on the avahi Unix socket is not correctly handled in the client_work function,

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
0.44% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 38.2% of scored records. A rank, not a probability.
NVD base score
5.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2021-06-02 15:09Z5 YR AGO
Last updated
2025-02-13 16:28Z1 YR AGO
Reserved
2021-03-26
Assigning CNA
redhat
Record state
PUBLISHED
Severity
Not rated by the issuing CNA
CNA CVSS vector
Not published by the issuing CNA
Weaknesses
  • CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')Base
Data version
5.1
Document digest
ea9b76e72dc550b5c890d5f656a5498ad7c8142696e60ae61219b61d6b88f503

05 Affected products

VendorProductVersionsPlatforms
n/aavahiAll avahi versions 0.6 up to 0.8—

06 References

07 Fixed in

AlmaLinux 8

  • avahi
    Fixed in 0.7-21.el8_9.1
  • avahi-autoipd
    Fixed in 0.7-21.el8_9.1
  • avahi-compat-howl
    Fixed in 0.7-21.el8_9.1
  • avahi-compat-howl-devel
    Fixed in 0.7-21.el8_9.1
  • avahi-compat-libdns_sd
    Fixed in 0.7-21.el8_9.1
  • avahi-compat-libdns_sd-devel
    Fixed in 0.7-21.el8_9.1
  • avahi-devel
    Fixed in 0.7-21.el8_9.1
  • avahi-glib
    Fixed in 0.7-21.el8_9.1
  • avahi-glib-devel
    Fixed in 0.7-21.el8_9.1
  • avahi-gobject
    Fixed in 0.7-21.el8_9.1
  • avahi-gobject-devel
    Fixed in 0.7-21.el8_9.1
  • avahi-libs
    Fixed in 0.7-21.el8_9.1
  • avahi-tools
    Fixed in 0.7-21.el8_9.1
  • avahi-ui
    Fixed in 0.7-21.el8_9.1
  • avahi-ui-devel
    Fixed in 0.7-21.el8_9.1
  • avahi-ui-gtk3
    Fixed in 0.7-21.el8_9.1
  • python3-avahi
    Fixed in 0.7-21.el8_9.1

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 9

  • avahi
    Fixed in 0.8-15.el9
  • avahi-compat-howl
    Fixed in 0.8-15.el9
  • avahi-compat-howl-devel
    Fixed in 0.8-15.el9
  • avahi-compat-libdns_sd
    Fixed in 0.8-15.el9
  • avahi-compat-libdns_sd-devel
    Fixed in 0.8-15.el9
  • avahi-devel
    Fixed in 0.8-15.el9
  • avahi-glib
    Fixed in 0.8-15.el9
  • avahi-glib-devel
    Fixed in 0.8-15.el9
  • avahi-libs
    Fixed in 0.8-15.el9
  • avahi-tools
    Fixed in 0.8-15.el9

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Arch Linux

  • avahi
    Fixed in 1:0.8+r127+g55d783d-1

Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.

CloudLinux 8

  • avahi
    Fixed in 0.7-21.el8_9.1
  • avahi-autoipd
    Fixed in 0.7-21.el8_9.1
  • avahi-compat-howl
    Fixed in 0.7-21.el8_9.1
  • avahi-compat-howl-devel
    Fixed in 0.7-21.el8_9.1
  • avahi-compat-libdns_sd
    Fixed in 0.7-21.el8_9.1
  • avahi-compat-libdns_sd-devel
    Fixed in 0.7-21.el8_9.1
  • avahi-devel
    Fixed in 0.7-21.el8_9.1
  • avahi-glib
    Fixed in 0.7-21.el8_9.1
  • avahi-glib-devel
    Fixed in 0.7-21.el8_9.1
  • avahi-gobject
    Fixed in 0.7-21.el8_9.1
  • avahi-gobject-devel
    Fixed in 0.7-21.el8_9.1
  • avahi-libs
    Fixed in 0.7-21.el8_9.1
  • avahi-tools
    Fixed in 0.7-21.el8_9.1
  • avahi-ui
    Fixed in 0.7-21.el8_9.1
  • avahi-ui-devel
    Fixed in 0.7-21.el8_9.1
  • avahi-ui-gtk3
    Fixed in 0.7-21.el8_9.1
  • python3-avahi
    Fixed in 0.7-21.el8_9.1

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • avahi
    Fixed in 0.8-15.el9
  • avahi-compat-howl
    Fixed in 0.8-15.el9
  • avahi-compat-howl-devel
    Fixed in 0.8-15.el9
  • avahi-compat-libdns_sd
    Fixed in 0.8-15.el9
  • avahi-compat-libdns_sd-devel
    Fixed in 0.8-15.el9
  • avahi-devel
    Fixed in 0.8-15.el9
  • avahi-glib
    Fixed in 0.8-15.el9
  • avahi-glib-devel
    Fixed in 0.8-15.el9
  • avahi-libs
    Fixed in 0.8-15.el9
  • avahi-tools
    Fixed in 0.8-15.el9

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • avahi
    Fixed in 0.8-7

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • avahi
    Fixed in 0.8-7

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • avahi
    Fixed in 0.8-7

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 18.04 LTS

  • avahi
    Fixed in 0.7-3.1ubuntu1.3

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • avahi
    Fixed in 0.7-4ubuntu7.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 14.04 LTS

  • avahi
    Fixed in 0.6.31-4ubuntu1.3+esm1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • avahi
    Fixed in 0.6.32~rc+dfsg-1ubuntu2.3+esm1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.