CVE-2026-90169

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90169", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.790Z", "datePublished": "2026-09-17T16:06:57.814Z", "dateUpdated": "2026-10-30T12:34:34.562Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:34:34.562Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: free preauth sessions on connection teardown\n\nSMB3.1.1 multichannel binding preserves the preauthentication hash in a\npreauth_session between the NTLM negotiate and authenticate requests.\nThe binding NTLM negotiate allocates this object and returns\nSTATUS_MORE_PROCESSING_REQUIRED. If the client disconnects before it sends\nthe authenticate request, neither the authenticate nor error cleanup paths\nfree the object.\n\nRelease any remaining preauthentication sessions when tearing down the\nconnection. Initialize the list when allocating the connection so that this\ncleanup is safe regardless of the negotiated dialect."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/server/connection.c", "fs/smb/server/mgmt/user_session.c", "fs/smb/server/mgmt/user_session.h", "fs/smb/server/smb2ops.c"], "versions": [{"version": "f5a544e3bab78142207e0242d22442db85ba1eff", "lessThan": "1f60a88b2e0203e50f65b0fb9c32ecb0ae0aa683", "status": "affected", "versionType": "git"}, {"version": "f5a544e3bab78142207e0242d22442db85ba1eff", "lessThan": "effcf48d79d8aa53113d8289e140746f25ceb62c", "status": "affected", "versionType": "git"}, {"version": "f5a544e3bab78142207e0242d22442db85ba1eff", "lessThan": "b62b1ebb25f0a19067ed5b1a86036b2dc98be44f", "status": "affected", "versionType": "git"}, {"version": "f5a544e3bab78142207e0242d22442db85ba1eff", "lessThan": "a41a98ee16ae038751b6639decadaa3ce15ca18a", "status": "affected", "versionType": "git"}, {"version": "f5a544e3bab78142207e0242d22442db85ba1eff", "lessThan": "8e2ebc77678832e981adc008d25cd8f67d08ebc4", "status": "affected", "versionType": "git"}, {"version": "f5a544e3bab78142207e0242d22442db85ba1eff", "lessThan": "06c7b1d731bc105a8644f1b70165ba8b9416cbab", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/server/connection.c", "fs/smb/server/mgmt/user_session.c", "fs/smb/server/mgmt/user_session.h", "fs/smb/server/smb2ops.c"], "versions": [{"version": "5.15", "status": "affected"}, {"version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/1f60a88b2e0203e50f65b0fb9c32ecb0ae0aa683"}, {"url": "https://git.kernel.org/stable/c/effcf48d79d8aa53113d8289e140746f25ceb62c"}, {"url": "https://git.kernel.org/stable/c/b62b1ebb25f0a19067ed5b1a86036b2dc98be44f"}, {"url": "https://git.kernel.org/stable/c/a41a98ee16ae038751b6639decadaa3ce15ca18a"}, {"url": "https://git.kernel.org/stable/c/8e2ebc77678832e981adc008d25cd8f67d08ebc4"}, {"url": "https://git.kernel.org/stable/c/06c7b1d731bc105a8644f1b70165ba8b9416cbab"}], "title": "ksmbd: free preauth sessions on connection teardown", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/smb/server/connection.c", "fs/smb/server/mgmt/user_session.c", "fs/smb/server/mgmt/user_session.h", "fs/smb/server/smb2ops.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "1f60a88b2e0203e50f65b0fb9c32ecb0ae0aa683", "status": "affected", "version": "f5a544e3bab78142207e0242d22442db85ba1eff", "versionType": "git"}, {"lessThan": "effcf48d79d8aa53113d8289e140746f25ceb62c", "status": "affected", "version": "f5a544e3bab78142207e0242d22442db85ba1eff", "versionType": "git"}, {"lessThan": "b62b1ebb25f0a19067ed5b1a86036b2dc98be44f", "status": "affected", "version": "f5a544e3bab78142207e0242d22442db85ba1eff", "versionType": "git"}, {"lessThan": "a41a98ee16ae038751b6639decadaa3ce15ca18a", "status": "affected", "version": "f5a544e3bab78142207e0242d22442db85ba1eff", "versionType": "git"}, {"lessThan": "8e2ebc77678832e981adc008d25cd8f67d08ebc4", "status": "affected", "version": "f5a544e3bab78142207e0242d22442db85ba1eff", "versionType": "git"}, {"lessThan": "06c7b1d731bc105a8644f1b70165ba8b9416cbab", "status": "affected", "version": "f5a544e3bab78142207e0242d22442db85ba1eff", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/smb/server/connection.c", "fs/smb/server/mgmt/user_session.c", "fs/smb/server/mgmt/user_session.h", "fs/smb/server/smb2ops.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.15"}, {"lessThan": "5.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: free preauth sessions on connection teardown\n\nSMB3.1.1 multichannel binding preserves the preauthentication hash in a\npreauth_session between the NTLM negotiate and authenticate requests.\nThe binding NTLM negotiate allocates this object and returns\nSTATUS_MORE_PROCESSING_REQUIRED. If the client disconnects before it sends\nthe authenticate request, neither the authenticate nor error cleanup paths\nfree the object.\n\nRelease any remaining preauthentication sessions when tearing down the\nconnection. Initialize the list when allocating the connection so that this\ncleanup is safe regardless of the negotiated dialect."}], "id": "CVE-2026-90169", "lastModified": "2026-10-30T13:20:44.900", "metrics": {}, "published": "2026-09-17T17:17:10.333", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/06c7b1d731bc105a8644f1b70165ba8b9416cbab"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1f60a88b2e0203e50f65b0fb9c32ecb0ae0aa683"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8e2ebc77678832e981adc008d25cd8f67d08ebc4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a41a98ee16ae038751b6639decadaa3ce15ca18a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b62b1ebb25f0a19067ed5b1a86036b2dc98be44f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/effcf48d79d8aa53113d8289e140746f25ceb62c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f5a544e3bab78142207e0242d22442db85ba1eff,effcf48d79d8aa53113d8289e140746f25ceb62c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f5a544e3bab78142207e0242d22442db85ba1eff,b62b1ebb25f0a19067ed5b1a86036b2dc98be44f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f5a544e3bab78142207e0242d22442db85ba1eff,a41a98ee16ae038751b6639decadaa3ce15ca18a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f5a544e3bab78142207e0242d22442db85ba1eff,8e2ebc77678832e981adc008d25cd8f67d08ebc4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f5a544e3bab78142207e0242d22442db85ba1eff,06c7b1d731bc105a8644f1b70165ba8b9416cbab)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.157,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.52,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-18T22:00:12.714088+00:00", "updated": "2026-09-20T03:00:11.238270+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-401"]}