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CVE-2023-31723

20
FAUCET Score

CVE-2023-31723 describes a segmentation violation vulnerability in yasm version 1.3.0.55.g101bc, specifically within the expand_mmac_params function. This medium-severity vulnerability (CVSS 5.5) can lead to a denial of service (availability impact) through local access and user interaction. There is currently no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
1.3.0.55.g101bcCPE matchmatch criteria
cpe:2.3:a:yasm_project:yasm:1.3.0.55.g101bc:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.29%
Probability of exploitation in next 30 days
EPSS Percentile
21.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0029 is in the 26th percentile among its peer group of 5,758 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

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

Remediation records are not available for this CVE.

References

github.com / DaisyPo/fuzzing-vulncollect/blob/main/yasm/SEGV/nasm-pp.c:4008%20in%20expand_mmac_params/README.md
ExploitThird Party Advisory
github.com / yasm/yasm/issues/220
ExploitIssue TrackingThird Party Advisory