Integer Underflow (Wrap or Wraparound) Affecting 389ds/389-ds-base package, versions [,3.3.1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published24 Sept 2026
- disclosed7 Sept 2026
- creditUnknown
Introduced: 7 Sep 2026
CVE-2026-18355 (opens in a new tab)How to fix?
Upgrade 389ds/389-ds-base to version 3.3.1 or higher.
Overview
Affected versions of this package are vulnerable to Integer Underflow (Wrap or Wraparound) in the sasl_io_start_packet process. An attacker can cause memory corruption and potentially execute arbitrary code by sending a specially crafted SASL wrapped record with a small length prefix after a successful SASL bind with integrity protection. This is only exploitable if a SASL security layer is negotiated after bind.