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CVE-2023-35784

24
FAUCET Score

CVE-2023-35784 describes a critical double free or use-after-free vulnerability affecting OpenBSD versions 7.2 (before errata 026) and 7.3 (before errata 004), as well as LibreSSL versions before 3.6.3 and 3.7.x before 3.7.3, occurring after an SSL_clear operation. This vulnerability carries a CVSS score of 9.8 (CRITICAL), indicating it is remotely exploitable with low attack complexity, requiring no user interaction, and potentially leading to complete compromise of confidentiality, integrity, and availability. Despite its high severity, 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
< 3.6.3CPE matchmatch criteria
cpe:2.3:a:openbsd:libressl:*:*:*:*:*:*:*:*
>= 3.7.0, < 3.7.3CPE matchmatch criteria
cpe:2.3:a:openbsd:libressl:*:*:*:*:*:*:*:*
7.2CPE matchmatch criteria
cpe:2.3:o:openbsd:openbsd:7.2:*:*:*:*:*:*:*
7.3CPE matchmatch criteria
cpe:2.3:o:openbsd:openbsd:7.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.95%
Probability of exploitation in next 30 days
EPSS Percentile
57.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0095 is in the 42nd percentile among its peer group of 36,833 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

ftp.openbsd.org / pub/OpenBSD/LibreSSL/libressl-3.6.3-relnotes.txt
Release Notes
ftp.openbsd.org / pub/OpenBSD/LibreSSL/libressl-3.7.3-relnotes.txt
Release Notes
ftp.openbsd.org / pub/OpenBSD/patches/7.2/common/026_ssl.patch.sig
Patch
ftp.openbsd.org / pub/OpenBSD/patches/7.3/common/004_ssl.patch.sig
Patch
github.com / libressl/openbsd/commit/e42d8f4b21a8a498e2eabbffe4c7b7d4ef7cec54