CVEvulnerability

CVE-2026-70368

6.5 MEDIUM Published 2026-08-04 Modified 2026-08-06 Official page ↗
Status
Awaiting Analysis
Published
2026-08-04
Last modified
2026-08-06
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Weaknesses
CWE-125

Description

A stack-based out-of-bounds read vulnerability exists in the "s_vlog" function of stunnel, when handling oversized log messages via "vsnprintf". A remote attacker with network access to a stunnel service can send protocol inputs that trigger a log message longer than 1024 bytes, leading to an out-of-bounds stack read and a potential crash. In certain corner cases, the same vulnerability could be used to replace a series of trailing "\n" characters with "\0".

Related

Weakness · CWE (1)

  • CWE-125 Out-of-bounds Read weakness

References