CVE-2022-43974: matrixssl Integer Overflow or Wraparound
Modified
Published 09-01-2023Last modified 06-03-2025
Vulnerability summary
CVE-2022-43974 is a critical (CVSS 9.8) Integer Overflow or Wraparound vulnerability in matrixssl. EPSS estimates a 1.80% chance of exploitation in the next 30 days, higher than 78.2% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
1.80%
0%100%
Low · +0.10 pp in 30 daysKEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded
Timeline
- 09-01-2023PublishedVulnerability first disclosed.
- 06-03-2025Last modifiedVulnerability information updated.
Description
MatrixSSL 4.0.4 through 4.5.1 has an integer overflow in matrixSslDecodeTls13. A remote attacker might be able to send a crafted TLS Message to cause a buffer overflow and achieve remote code execution. This is fixed in 4.6.0.
CVSS metrics
2 scores · 2 sources · 1 versionCritical 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSources2 sources · 8.1–9.8
- CVE.orgCNA8.1HighCVSS:3.1/AC:H/AV:N/A:H/C:H/I:H/PR:N/S:U/UI:NDiffers
EPSS trend
Probability
1.80%
Chance of exploitation in the next 30 days
Percentile
78%
Versus all other CVEs
30-day change
Increase +0.10 pp
From 1.70% on 22-09-2026
22-09-202622-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Matrixssl1 product
- matrixssl≥ 4.0.0, < 4.6.0
1 vendor · 1 product
References
3 links- github.com/matrixssl/matrixssl/security/advisories/GHSA-fmwc-gwc5-2g29Third Party Advisory