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CVE-2023-38470

17
FAUCET Score

CVE-2023-38470 is a medium-severity vulnerability affecting Avahi, specifically within the avahi_escape_label() function, and impacts various Avahi and Red Hat Enterprise Linux distributions. This local vulnerability, with low attack complexity, could lead to a denial of service (availability impact) if exploited. There is currently no public exploit code available, nor is it known to be actively exploited, with minimal community discussion and media coverage observed.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.9CPE matchmatch criteria
cpe:2.3:a:avahi:avahi:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
All Versions ImpactedCPE match
cpe:2.3:o:fedoraproject:fedora:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.2MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.5
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.32%
Probability of exploitation in next 30 days
EPSS Percentile
24.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0032 is in the 81st percentile among its peer group of 15,940 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (16)

denopatch availablevia llm_extracted
View patch
keraspatch availablevia llm_extracted
View patch
microsoftpatch availablevia msrc
Product: azl3 avahi 0.8-5 on Azure Linux 3.0Fixed in: 0.8-4
microsoftpatch availablevia msrc
Product: 18262-17084Fixed in: 0.8-4
microsoftpatch availablevia msrc
Product: 17556-17084Fixed in: 0.8-4
microsoftpatch availablevia msrc
Product: cbl2 avahi 0.8-3 on CBL Mariner 2.0Fixed in: 0.8-3
microsoftpatch availablevia msrc
Product: azl3 avahi 0.8-4 on Azure Linux 3.0Fixed in: 0.8-4
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 x64Fixed in: 0.8-4
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 ARMFixed in: 0.8-4
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 0.8-3
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 0.8-3
microsoftpatch availablevia msrc
Product: 18261-16823Fixed in: 0.8-3
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: avahi-0:0.8-20.el9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: avahi-0:0.7-21.el8_9.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.8 Extended Update SupportFixed in: avahi-0:0.7-20.el8_8.4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: avahi-0:0.7-20.el8_6.3
View patch

Vendor Advisories (5)

microsoft2024-Dec/CVE-2023-38470

CVE-2023-38470

Dec 10, 2024
denollm-deno-650ac71876afb4f8CRITICAL

HP ThinPro 8.1 SP 2 Security Updates

Apr 12, 2024
kerasllm-keras-d13bbd8768a57997CRITICAL

HP ThinPro 8.1 SP 2 Security Updates

Apr 12, 2024
microsoft2023-Nov/CVE-2023-38470Moderate

Reachable assertion in avahi_escape_label

Nov 14, 2023
redhatCVE-2023-38470Moderate

avahi: Reachable assertion in avahi_escape_label

Apr 26, 2023

References

lists.debian.org / debian-lts-announce/2024/12/msg00011.html
access.redhat.com / security/cve/CVE-2023-38470
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory