🛡️ CVE-2026-56968 on Ubuntu — gsasl

⚪ Unknown ✅ No Known Exploit OSV

N/A

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

GNU SASL before 2.2.4 lacks sanitization of a short challenge in _gsasl_ntlm_client_step in the NTLM client, which could result in memory disclosure via a crafted server.

Distribution advisory

This page covers CVE-2026-56968 as tracked by Ubuntu, for the package gsasl. No fixed version has been recorded for this distribution yet.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity none, availability none.

Weakness class

UBUNTU-CVE-2026-56968 is classified as CWE-839: Numeric Range Comparison Without Minimum Check. The product checks a value to ensure that it is less than or equal to a maximum, but it does not also verify that the value is greater than or equal to the minimum.

Affected software

UBUNTU-CVE-2026-56968 is recorded against 1 package.

gsasl

Timeline and source

Published on 23 June 2026 and last revised on 30 June 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

ubuntu.com (Report)
www.cve.org (Report)
lists.gnu.org (Report)

Details

Severity Unknown

CVSS Score N/A

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

CWE N/A

Public Exploit ✅ No

Source OSV

Published 2026-06-23

Updated 2026-08-20

Modified 2026-06-30

Fix URL N/A

Affected Packages

Software	From version	Fixed in
gsasl	—	—

References

REPORT https://ubuntu.com/security/CVE-2026-56968

REPORT https://www.cve.org/CVERecord?id=CVE-2026-56968

REPORT https://lists.gnu.org/archive/html/help-gsasl/2026-06/msg00000.html

🔗 NVD 🔗 Mitre

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