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CVE-2023-39743

17
FAUCET Score

CVE-2023-39743 describes an access violation vulnerability in lrzip-next LZMA v23.01, specifically within the /bz3_decode_block component of src/libbz3.c, affecting the pete4abw lzma_software_development_kit. This medium-severity vulnerability (CVSS 5.3) is network-exploitable with low attack complexity, requiring no user interaction or privileges, and primarily impacts availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
23.01CPE matchmatch criteria
cpe:2.3:a:pete4abw:lzma_software_development_kit:23.01:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.67%
Probability of exploitation in next 30 days
EPSS Percentile
48.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0067 is in the 30th percentile among its peer group of 23,701 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.

References

gist.github.com / huanglei3/ec9090096aa92445cf0a8baa8e929084
github.com / huanglei3/lrzip-next-poc/tree/main
Technical Description
github.com / pete4abw/lrzip-next/issues/132
ExploitIssue Tracking