{ "document": { "acknowledgments": [ { "names": [ "Vincent Yin with Microsoft" ] }, { "names": [ "Jonathan Guerin with Microsoft" ] } ], "aggregate_severity": { "namespace": "https://www.microsoft.com/en-us/msrc/security-update-severity-rating-system", "text": "Critical" }, "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "text": "Public", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en-US", "notes": [ { "category": "general", "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle", "title": "Additional Resources" }, { "category": "legal_disclaimer", "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.", "title": "Disclaimer" }, { "category": "general", "text": "Required. The vulnerability documented by this CVE requires customer action to resolve.", "title": "Customer Action" } ], "publisher": { "category": "vendor", "contact_details": "secure@microsoft.com", "name": "Microsoft Security Response Center", "namespace": "https://msrc.microsoft.com" }, "references": [ { "category": "self", "summary": "CVE-2026-45476 Microsoft Azure Network Adapter Elevation of Privilege Vulnerability - HTML", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45476" }, { "category": "self", "summary": "CVE-2026-45476 Microsoft Azure Network Adapter Elevation of Privilege Vulnerability - CSAF", "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-45476.json" }, { "category": "external", "summary": "Microsoft Exploitability Index", "url": "https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1" }, { "category": "external", "summary": "Microsoft Support Lifecycle", "url": "https://support.microsoft.com/lifecycle" }, { "category": "external", "summary": "Common Vulnerability Scoring System", "url": "https://www.first.org/cvss" } ], "title": "Microsoft Azure Network Adapter Elevation of Privilege Vulnerability", "tracking": { "current_release_date": "2026-06-09T07:00:00.000Z", "generator": { "date": "2026-06-10T17:53:11.829Z", "engine": { "name": "MSRC Generator", "version": "1.0" } }, "id": "msrc_CVE-2026-45476", "initial_release_date": "2026-06-09T07:00:00.000Z", "revision_history": [ { "date": "2026-06-09T07:00:00.000Z", "legacy_version": "1", "number": "1", "summary": "Information published." } ], "status": "final", "version": "1" } }, "product_tree": { "branches": [ { "branches": [ { "category": "product_version_range", "name": "<7.1", "product": { "name": "Linux kernel - Microsoft MANA Network Driver <7.1", "product_id": "1" } }, { "category": "product_version", "name": "7.1", "product": { "name": "Linux kernel - Microsoft MANA Network Driver 7.1", "product_id": "21356" } } ], "category": "product_name", "name": "Linux kernel - Microsoft MANA Network Driver" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-45476", "cwe": { "id": "CWE-416", "name": "Use After Free" }, "notes": [ { "category": "general", "text": "Microsoft", "title": "Assigning CNA" }, { "category": "faq", "text": "To help protect your systems from this vulnerability, update your Linux kernel to a version that includes the upstream fix for this issue. The fix has already been accepted upstream and will be included in newer kernel releases.\nIf your environment uses a Linux distribution that has not yet incorporated the updated kernel version, you should monitor your distribution vendor’s security advisories and apply the appropriate security update as soon as it becomes available. Some distributions may release the fix immediately through security updates, while others may include it in a future kernel package or maintenance release.\nOrganizations that maintain custom kernels or remain on older kernel branches may need to manually backport or apply the upstream patch according to their standard patch management and validation processes.\nAs a general best practice, ensure systems are regularly updated with the latest security patches and kernel releases provided by your operating system vendor.", "title": "What do I have to do to protect myself from this vulnerability?" }, { "category": "faq", "text": "An attacker who successfully exploited this vulnerability could gain ELEVATED privileges, which may allow them to perform actions beyond their original permissions.", "title": "What privileges could be gained by an attacker who successfully exploited this vulnerability?" }, { "category": "faq", "text": "An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.", "title": "According to the CVSS metric, a successful exploitation could lead to a scope change (S:C). What does this mean for this vulnerability?" }, { "category": "faq", "text": "An attacker who already has control of the host environment could trigger a flaw in the guest driver that mishandles memory. This could allow the attacker to read sensitive information from the guest and potentially use that access to gain higher privileges within the guest system.", "title": "How could an attacker exploit the vulnerability?" } ], "product_status": { "fixed": [ "21356" ], "known_affected": [ "1" ] }, "references": [ { "category": "self", "summary": "CVE-2026-45476 Microsoft Azure Network Adapter Elevation of Privilege Vulnerability - HTML", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45476" }, { "category": "self", "summary": "CVE-2026-45476 Microsoft Azure Network Adapter Elevation of Privilege Vulnerability - CSAF", "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-45476.json" } ], "remediations": [ { "category": "vendor_fix", "date": "2026-06-09T07:00:00.000Z", "details": "7.1:Security Update:https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=3985c9a56da4", "product_ids": [ "1" ], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=3985c9a56da4" } ], "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "environmentalsScore": 0.0, "exploitCodeMaturity": "UNPROVEN", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "remediationLevel": "OFFICIAL_FIX", "reportConfidence": "CONFIRMED", "scope": "CHANGED", "temporalScore": 7.1, "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C", "version": "3.1" }, "products": [ "1" ] } ], "threats": [ { "category": "impact", "details": "Elevation of Privilege" }, { "category": "exploit_status", "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely" } ], "title": "Microsoft Azure Network Adapter Elevation of Privilege Vulnerability" } ] }