Out-of-bounds Read Affecting stunnel-doc package, versions <5.74-160000.3.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.35% (28th percentile)

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  • Snyk IDSNYK-SLES1600-STUNNELDOC-21355892
  • published21 Oct 2026
  • disclosed12 Oct 2026

Introduced: 12 Oct 2026

NewCVE-2026-70368  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade SLES:16.0.0 stunnel-doc to version 5.74-160000.3.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream stunnel-doc package and not the stunnel-doc package as distributed by SLES. See How to fix? for SLES:16.0.0 relevant fixed versions and status.

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".

CVSS Base Scores

version 3.1