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CVE-2022-40320

28
FAUCET Score

CVE-2022-40320 is a heap-based buffer over-read vulnerability in the cfg_tilde_expand function of libConfuse 3.3, impacting fedoraproject fedora and libconfuse_project libconfuse. It carries a high CVSS score of 8.8, indicating a critical risk due to its network-based attack vector, low attack complexity, and high potential for confidentiality, integrity, and availability impacts. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
3.3CPE matchmatch criteria
cpe:2.3:a:libconfuse_project:libconfuse:3.3:*:*:*:*:*:*:*
35CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
36CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
37CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.12%
Probability of exploitation in next 30 days
EPSS Percentile
62.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0112 is in the 62nd percentile among its peer group of 14,848 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (13)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: 18614-16820Fixed in: 3.3-2
microsoftpatch availablevia msrc
Product: 18615-16823Fixed in: 3.3-2
microsoftpatch availablevia msrc
Product: 18616-17084Fixed in: 3.3-2
microsoftpatch availablevia msrc
Product: cm1 libconfuse 3.3-2 on CBL Mariner 1.0Fixed in: 3.3-2
microsoftpatch availablevia msrc
Product: cbl2 libconfuse 3.3-2 on CBL Mariner 2.0Fixed in: 3.3-2
microsoftpatch availablevia msrc
Product: azl3 libconfuse 3.3-2 on Azure Linux 3.0Fixed in: 3.3-2
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 3.3-2
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 3.3-2
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 x64Fixed in: 3.3-2
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 ARMFixed in: 3.3-2
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 x64Fixed in: 3.3-2
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 ARMFixed in: 3.3-2

Vendor Advisories (2)

microsoft2024-Jun/CVE-2022-40320

CVE-2022-40320

Jun 11, 2024
microsoft2022-Sep/CVE-2022-40320Important

cfg_tilde_expand in confuse.c in libConfuse 3.3 has a heap-based buffer over-read.

Sep 13, 2022

References

github.com / libconfuse/libconfuse/issues/163
ExploitIssue TrackingPatchThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/BSAZK4KAWRWNAFUBBXOYU3PVNH3X7226
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/EDUT2V62V2XF2IT5TJFPB6P3EQ6X5VLL
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/FJKHAPJ6AUWVP4HDGKH4M5A2XXWQI73O