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CVE-2024-36844

21
FAUCET Score

CVE-2024-36844 is a use-after-free vulnerability in libmodbus v3.1.6, specifically affecting the ctx->backend pointer. This flaw allows unauthenticated attackers to trigger a Denial of Service (DoS) by sending a specially crafted message to the unit-test-server. With a CVSS score of 7.5 (HIGH), it presents a significant risk due to its network-based attack vector and low attack complexity, requiring no user interaction or privileges. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion, indicating a low immediate threat of widespread exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
3.1.6CPE matchmatch criteria
cpe:2.3:a:libmodbus:libmodbus:3.1.6:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.61%
Probability of exploitation in next 30 days
EPSS Percentile
45.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0061 is in the 22nd percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Vendor Patches (1)

github_advisoryvendor investigatingvia nvd_reference
View patch

References

lists.debian.org / debian-lts-announce/2025/03/msg00010.html
github.com / stephane/libmodbus/issues/749
ExploitIssue TrackingVendor Advisory