Is CVE-2023-29323 in the CISA KEV catalog?

No. CVE-2023-29323 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-29323?

CVE-2023-29323 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2023-29323?

CVE-2023-29323 has an EPSS score of 0.28% (20th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-29323?

Upgrade opensmtpd on debian 13 to 7.3.0p1-1 or later.

CVE & CISA-KEV Catalog

CVE-2023-29323

HIGH

7.8

CVSS v3

NVD

Description

ascii_load_sockaddr in smtpd in OpenBSD before 7.1 errata 024 and 7.2 before errata 020, and OpenSMTPD Portable before 7.0.0-portable commit f748277, can abort upon a connection from a local, scoped IPv6 address.

How to fix

Remediation Available

opensmtpdDebian

Fixed in:7.3.0p1-1CVE-2023-29323

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.28%probability of exploitation in 30 days

20thpercentile

Low risk: more likely to be exploited than 20% of all known CVEs.

References

Patch4

Product3

Other references3

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-04.