A flaw was found in gss-ntlmssp. A memory leak occurs in the NTLM target-info parser when a crafted NTLM CHALLENGE message contains duplicated string-valued AV_PAIR entries. The parser allocates memory for each string value but does not free the previous allocation when the same AV_PAIR type appears more than once, leaking the earlier allocation. A malicious or man-in-the-middle server can exploit this to cause gradual memory exhaustion on the client during NTLM authentication, leading to a denial of service.
Metrics
Affected Vendors & Products
References
History
Fri, 06 Nov 2026 20:00:00 +0000
| Type | Values Removed | Values Added |
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| CPEs | cpe:/a:redhat:enterprise_linux:8 |
Thu, 17 Sep 2026 15:30:00 +0000
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| Metrics |
ssvc
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Wed, 16 Sep 2026 00:15:00 +0000
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| References |
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| Metrics |
threat_severity
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threat_severity
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Tue, 15 Sep 2026 12:00:00 +0000
| Type | Values Removed | Values Added |
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| Description | A flaw was found in gss-ntlmssp. A memory leak occurs in the NTLM target-info parser when a crafted NTLM CHALLENGE message contains duplicated string-valued AV_PAIR entries. The parser allocates memory for each string value but does not free the previous allocation when the same AV_PAIR type appears more than once, leaking the earlier allocation. A malicious or man-in-the-middle server can exploit this to cause gradual memory exhaustion on the client during NTLM authentication, leading to a denial of service. | |
| Title | Gss-ntlmssp: gss-ntlmssp: memory leak in ntlm_decode_target_info via duplicated av_pair entries in ntlm challenge | |
| First Time appeared |
Redhat
Redhat enterprise Linux |
|
| Weaknesses | CWE-401 | |
| CPEs | cpe:/o:redhat:enterprise_linux:8 | |
| Vendors & Products |
Redhat
Redhat enterprise Linux |
|
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: redhat
Published: 2026-09-15T11:49:10.516Z
Updated: 2026-11-06T19:56:33.639Z
Reserved: 2026-09-15T10:53:12.456Z
Link: CVE-2026-91926
Updated: 2026-09-17T14:24:27.860Z
Status : Awaiting Analysis
Published: 2026-09-15T12:17:54.500
Modified: 2026-11-06T20:17:28.823
Link: CVE-2026-91926