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{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: reject userspace cifs.spnego descriptions\n\ncifs.spnego key descriptions contain authority-bearing fields such as\npid, uid, creduid, and upcall_target that cifs.upcall treats as\nkernel-originating inputs. However, userspace can also create keys of\nthis type through request_key(2) or add_key(2), allowing those fields to\nbe supplied without CIFS origin.\n\nOnly accept cifs.spnego descriptions while CIFS is using its private\nspnego_cred to request the key."}], "id": "CVE-2026-46243", "lastModified": "2026-06-01T19:16:53.537", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2026-06-01T17:17:34.173", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0aece6685fc80a8de492688ca2315fb86ec379c7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2035acfb17221729b1b8ac335e941868a04ca079"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3da1fdf4efbc490041eb4f836bf596201203f8f2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7713bd320ed4fc3d08a227cd8e41242219a16981"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/91f89c1d83e80417629791fcef6af8140d7d01c8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9544559e59438a4b609b2fdfa0763d8360572824"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a3bbda6502a9398b816fa2e71c9a3f955f58013d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cf20038657d6d4974349556a34e08fe0490bebbc"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/manizada/CIFSwitch"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f1d662a7d5e5322e583aad6b3cfec03d8f27b435,7713bd320ed4fc3d08a227cd8e41242219a16981)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f1d662a7d5e5322e583aad6b3cfec03d8f27b435,9544559e59438a4b609b2fdfa0763d8360572824)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f1d662a7d5e5322e583aad6b3cfec03d8f27b435,cf20038657d6d4974349556a34e08fe0490bebbc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f1d662a7d5e5322e583aad6b3cfec03d8f27b435,2035acfb17221729b1b8ac335e941868a04ca079)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f1d662a7d5e5322e583aad6b3cfec03d8f27b435,a3bbda6502a9398b816fa2e71c9a3f955f58013d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f1d662a7d5e5322e583aad6b3cfec03d8f27b435,91f89c1d83e80417629791fcef6af8140d7d01c8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f1d662a7d5e5322e583aad6b3cfec03d8f27b435,0aece6685fc80a8de492688ca2315fb86ec379c7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f1d662a7d5e5322e583aad6b3cfec03d8f27b435,3da1fdf4efbc490041eb4f836bf596201203f8f2)"}}], "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": "kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.24"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.24)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.258,6.0.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.209,6.0.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.175,7.0.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.142,7.0.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.92,7.0.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.34,7.0.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.11,8.0.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1-rc5,*]"}}], "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": "kernel", "vendor": "linux"}], "created": "2026-06-01T19:15:11.607783+00:00", "title": "Privilege Escalation via User-Provided CIFS SPNEGO Key Descriptions", "updated": "2026-06-01T19:15:11.880079+00:00", "vendors": ["linux", "linux$PRODUCT$kernel"], "weaknesses": ["CWE-285"]}