CVE-2023-35784

CRITICAL

Openbsd Libressl < 3.6.3 - Use After Free

Title source: rule

Description

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.

References (5)

[Release Notes] https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-3.6.3-relnotes.txt

[Release Notes] https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-3.7.3-relnotes.txt

[Patch] https://ftp.openbsd.org/pub/OpenBSD/patches/7.2/common/026_ssl.patch.sig

[Patch] https://ftp.openbsd.org/pub/OpenBSD/patches/7.3/common/004_ssl.patch.sig

[Patch] https://github.com/libressl/openbsd/commit/e42d8f4b21a8a498e2eabbffe4c7b7d4ef7cec54

View Patch ZIP pw:eip

Scores

CVSS v3 9.8

EPSS 0.0011

EPSS Percentile 28.9%

Attack Vector NETWORK

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

Classification

CWE

CWE-415 CWE-416

Status published

Affected Products (3)

openbsd/libressl < 3.6.3

openbsd/openbsd

Timeline

Published Jun 16, 2023

Tracked Since Feb 18, 2026