Gss-ntlmssp: gss-ntlmssp: memory leak in ntlm_decode_target_info via duplicated av_pair entries in ntlm challenge
Severity and exploitation
KEV coverage does not rule out exploitation.
Assessment vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:LSeverity
low3.7CVSS measures technical severity, not the likelihood of an attack.
Known exploitation
Not listed in the checked CISA KEV catalog
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Public exploit
Not established by this record
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Remediation
Source guidance available
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What this means
A memory leak in gss-ntlmssp's NTLM target-info parser occurs when a crafted NTLM CHALLENGE message contains duplicated AV_PAIR entries, potentially causing denial of service. The vulnerability affects Red Hat Enterprise Linux 8. A malicious server can exploit this during NTLM authentication.
Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.Attack conditions
No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.
Review supporting sources →Affected versions
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Red Hat · redhat
Red Hat Enterprise Linux 8
0 ranges
Red Hat · redhat
Red Hat Enterprise Linux 8
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Other versions: affected
Product identifiers (CPE)
cpe:/a:redhat:enterprise_linux:8What to do
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No mitigation is currently available that meets Red Hat Product Security's standards for usability, deployment, applicability, or stability.
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Public exploit evidence
No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.
Original source description
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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.
References
2 sourcesInside the record
Evidence available
Describes the evidence in this view, not whether the product is safe.
Original records
CVE-2026-91926View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.
cve.new JSON →Underlying weaknesses
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Contributing organizations · 2
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Timeline
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Last imported by cve.new
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What changed
Follow changesLarge field values are marked as truncated previews. Original source snapshots remain retained.