CVE-2026-56968: CWE-839 Numeric Range Comparison Without Minimum Check in GNU GNU SASL
GNU SASL versions before 2.2.4 contain a vulnerability in the NTLM client implementation where a short challenge is not properly sanitized in the _gsasl_ntlm_client_step function. This flaw can lead to memory disclosure when interacting with a crafted server. The vulnerability has a low severity rating and a CVSS score of 3.7.
AI Analysis
Technical Summary
CVE-2026-56968 is a numeric range comparison vulnerability (CWE-839) in GNU SASL prior to version 2.2.4. The issue arises from insufficient sanitization of a short challenge in the _gsasl_ntlm_client_step function of the NTLM client, potentially allowing a malicious server to cause memory disclosure. The vulnerability is network exploitable without privileges or user interaction but requires high attack complexity. No official patch or remediation level has been confirmed in the available data.
Potential Impact
The vulnerability can result in limited information disclosure from memory when a client using the affected GNU SASL NTLM implementation communicates with a crafted malicious server. There is no indication of impact on integrity or availability. The overall impact is confidentiality loss of a low severity level.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should exercise caution when connecting to untrusted servers using the NTLM client in GNU SASL. No vendor-provided mitigation or workaround is currently documented.
CVE-2026-56968: CWE-839 Numeric Range Comparison Without Minimum Check in GNU GNU SASL
Description
GNU SASL versions before 2.2.4 contain a vulnerability in the NTLM client implementation where a short challenge is not properly sanitized in the _gsasl_ntlm_client_step function. This flaw can lead to memory disclosure when interacting with a crafted server. The vulnerability has a low severity rating and a CVSS score of 3.7.
CVSS v3.1
Score 3.7low
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-56968 is a numeric range comparison vulnerability (CWE-839) in GNU SASL prior to version 2.2.4. The issue arises from insufficient sanitization of a short challenge in the _gsasl_ntlm_client_step function of the NTLM client, potentially allowing a malicious server to cause memory disclosure. The vulnerability is network exploitable without privileges or user interaction but requires high attack complexity. No official patch or remediation level has been confirmed in the available data.
Potential Impact
The vulnerability can result in limited information disclosure from memory when a client using the affected GNU SASL NTLM implementation communicates with a crafted malicious server. There is no indication of impact on integrity or availability. The overall impact is confidentiality loss of a low severity level.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should exercise caution when connecting to untrusted servers using the NTLM client in GNU SASL. No vendor-provided mitigation or workaround is currently documented.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-06-23T16:18:28.745Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a3ab6dbeed863c81e4f9f7b
Added to database: 06/23/2026, 16:39:55 UTC
Last enriched: 06/23/2026, 16:54:46 UTC
Last updated: 06/23/2026, 16:54:46 UTC
Views: 3
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