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TI-2023-17874 Aliases CVE-2023-35784GHSA-w423-44w8-64mh

A double free or use after free could occur after SSL_clear in OpenBSD 7.2 before errata…

Priority MEDIUM 51CWE-415Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-415 and the CVSS impact.

Summary

A double free or use after free could occur after SSL_clear in OpenBSD 7.2 before errata 026 and 7.3 before errata 004, and in LibreSSL before 3.6.3 and 3.7.x before 3.7.3. NOTE: OpenSSL is not affected.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0094 61st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:openbsd:libressl:*:*:*:*:*:*:*:*before 3.6.3; 3.7.0 to before 3.7.3VulnerableOpenBSD
cpe:2.3:o:openbsd:openbsd:7.2:*:*:*:*:*:*:*7.2VulnerableOpenBSD
cpe:2.3:o:openbsd:openbsd:7.3:*:*:*:*:*:*:*7.3VulnerableOpenBSD
  • cpe:2.3:a:openbsd:libressl:*:*:*:*:*:*:*:* Versions before 3.6.3; 3.7.0 to before 3.7.3 Vulnerable ·OpenBSD
  • cpe:2.3:o:openbsd:openbsd:7.2:*:*:*:*:*:*:* Versions 7.2 Vulnerable ·OpenBSD
  • cpe:2.3:o:openbsd:openbsd:7.3:*:*:*:*:*:*:* Versions 7.3 Vulnerable ·OpenBSD

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-35784
  2. 2026-10-03 Alias added: GHSA-w423-44w8-64mh

References

Patch 2

Other 3

  • TI-2021-21548 x509/x509_verify.c in LibreSSL before 3.4.2, and OpenBSD before 7.0 errata 006, allows… CVSS 3.1CRITICAL 9.8
  • TI-2015-04488 Out-of-bounds write in LibreSSL CVSS 3.1CRITICAL 9.8
  • TI-2015-04487 Uncontrolled resource consumption in LibreSSL CVSS 3.1HIGH 7.5
  • TI-2014-07651 Double free vulnerability in the ssl_parse_clienthello_use_srtp_ext function in d1_srtp.c… CVSS 2.0HIGH 7.5
  • TI-2018-06502 The int_x509_param_set_hosts function in lib/libcrypto/x509/x509_vpm.c in LibreSSL 2.7.0… CVSS 3.0HIGH 7.4
  • TI-2019-15189 LibreSSL 2.9.1 through 3.2.1 has an out-of-bounds read in asn1_item_print_ctx (called from asn1_template_print_ctx). CVSS 3.1HIGH 7.1
See all 11 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences