{"affected":[{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"gssntlmssp","product":"Red Hat Enterprise Linux 8","source":"CNA: redhat","vendor":"Red Hat","versions":[]}],"cveId":"CVE-2026-91926","cwes":["CWE-401"],"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.","epss":{"date":"2026-11-06","percentile":0.31179,"score":0.00371},"exploits":[],"kev":null,"metrics":[{"score":3.7,"severity":"low","source":"CNA: redhat","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"}],"modifiedAt":1793994993639,"publishedAt":1789472950516,"references":[{"source":"CNA: redhat","tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-91926"},{"source":"CNA: redhat","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533698"}],"remediation":[{"kind":"workaround","source":"CNA: redhat","text":"No mitigation is currently available that meets Red Hat Product Security's standards for usability, deployment, applicability, or stability."}],"revision":"2623a9f973b569943d01fa15cf631bc195a70ac365eb7d2a03fc860225d06d02","sources":[{"modifiedAt":1793994993639,"name":"CNA: redhat","retrievedAt":1793995907561,"url":"https://www.cve.org/CVERecord?id=CVE-2026-91926"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793995927488,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-91926"}],"ssvc":{"assessedAt":1789655054247,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Gss-ntlmssp: gss-ntlmssp: memory leak in ntlm_decode_target_info via duplicated av_pair entries in ntlm challenge","updatedAt":1793995927488}