{ "document": { "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "tlp": { "label": "WHITE" } }, "lang": "nl", "notes": [ { "category": "legal_disclaimer", "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions:\n\n NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein.\n\n NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory.\n This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings." }, { "category": "description", "text": "De FreeBSD community heeft meerdere kwetsbaarheden verholpen in bhyve Hypervisor", "title": "Feiten" }, { "category": "description", "text": "De kwetsbaarheden betreffen race conditions, onjuiste validatie en synchronisatieproblemen in verschillende device modellen binnen de bhyve hypervisor. Een kwaadwillende gast-virtuele machine kan deze fouten misbruiken om een denial of service te veroorzaken door het bhyve proces te laten crashen of om arbitraire code uit te voeren in de host userspace. Dit kan plaatsvinden via manipulatie van event ring size en Transfer Request Block (TRB) velden in de USB 3 device model, het triggeren van out-of-bounds geheugen toegang door onjuiste controle van zero-length Buffer Descriptor List entries in de HDA audio device model, en door het misbruiken van duplicaten, unsynchronized constanten en ontbrekende validatie van resolutieparameters in de framebuffer device model. Deze kwetsbaarheden zijn specifiek voor systemen die de bhyve hypervisor gebruiken.", "title": "Interpretaties" }, { "category": "description", "text": "FreeBSD heeft updates uitgebracht om deze kwetsbaarheden in de bhyve hypervisor te verhelpen. Zie bijgevoegde referenties voor meer informatie.", "title": "Oplossingen" }, { "category": "general", "text": "medium", "title": "Kans" }, { "category": "general", "text": "high", "title": "Schade" }, { "category": "general", "text": "Heap-based Buffer Overflow", "title": "CWE-122" }, { "category": "general", "text": "Buffer Over-read", "title": "CWE-126" }, { "category": "general", "text": "Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')", "title": "CWE-362" }, { "category": "general", "text": "Time-of-check Time-of-use (TOCTOU) Race Condition", "title": "CWE-367" }, { "category": "general", "text": "Out-of-bounds Write", "title": "CWE-787" } ], "publisher": { "category": "coordinator", "contact_details": "cert@ncsc.nl", "name": "Nationaal Cyber Security Centrum", "namespace": "https://www.ncsc.nl/" }, "references": [ { "category": "external", "summary": "Reference", "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:70.tcp.asc" }, { "category": "external", "summary": "Reference", "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:71.sound.asc" }, { "category": "external", "summary": "Reference", "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:72.bhyve.asc" } ], "title": "Kwetsbaarheden verholpen in FreeBSD bhyve hypervisor", "tracking": { "current_release_date": "2026-10-22T12:59:18.643662Z", "generator": { "date": "2025-08-04T16:30:00Z", "engine": { "name": "V.A.", "version": "1.3" } }, "id": "NCSC-2026-0452", "initial_release_date": "2026-10-22T12:59:18.643662Z", "revision_history": [ { "date": "2026-10-22T12:59:18.643662Z", "number": "1.0.0", "summary": "Initiele versie" } ], "status": "final", "version": "1.0.0" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/*", "product": { "name": "vers:unknown/*", "product_id": "CSAFPID-1" } } ], "category": "product_name", "name": "FreeBSD" } ], "category": "vendor", "name": "FreeBSD" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-101307", "cwe": { "id": "CWE-122", "name": "Heap-based Buffer Overflow" }, "notes": [ { "category": "other", "text": "Heap-based Buffer Overflow", "title": "CWE-122" }, { "category": "other", "text": "Out-of-bounds Write", "title": "CWE-787" }, { "category": "description", "text": "A vulnerability in the RACK TCP stack allows remote attackers to cause an out-of-bounds write in the kernel heap by triggering the PCM sample array allocation counter to wrap, potentially resulting in a kernel panic.", "title": "Summary" }, { "category": "general", "text": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "title": "CVSSV4" } ], "product_status": { "known_affected": [ "CSAFPID-1" ] }, "references": [ { "category": "self", "summary": "CVE-2026-101307 | NCSC-NL Website", "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-101307.json" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H", "baseScore": 9.1, "baseSeverity": "CRITICAL" }, "products": [ "CSAFPID-1" ] } ], "title": "CVE-2026-101307" }, { "cve": "CVE-2026-101308", "cwe": { "id": "CWE-367", "name": "Time-of-check Time-of-use (TOCTOU) Race Condition" }, "notes": [ { "category": "other", "text": "Time-of-check Time-of-use (TOCTOU) Race Condition", "title": "CWE-367" }, { "category": "description", "text": "A race condition in the sound(4) driver enables an unprivileged local user to exploit a use-after-free vulnerability via buffer resizing and mmap interactions, potentially resulting in privilege escalation.", "title": "Summary" } ], "product_status": { "known_affected": [ "CSAFPID-1" ] }, "references": [ { "category": "self", "summary": "CVE-2026-101308 | NCSC-NL Website", "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-101308.json" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM" }, "products": [ "CSAFPID-1" ] } ], "title": "CVE-2026-101308" }, { "cve": "CVE-2026-101309", "cwe": { "id": "CWE-362", "name": "Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')" }, "notes": [ { "category": "other", "text": "Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')", "title": "CWE-362" }, { "category": "description", "text": "A vulnerability in the xHCI (USB 3) device model allowed exploitation of a race condition by manipulating event ring size and TRB fields, potentially causing host userspace code execution or crashing the bhyve process.", "title": "Summary" } ], "product_status": { "known_affected": [ "CSAFPID-1" ] }, "references": [ { "category": "self", "summary": "CVE-2026-101309 | NCSC-NL Website", "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-101309.json" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.0, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-1" ] } ], "title": "CVE-2026-101309" }, { "cve": "CVE-2026-101310", "cwe": { "id": "CWE-126", "name": "Buffer Over-read" }, "notes": [ { "category": "other", "text": "Buffer Over-read", "title": "CWE-126" }, { "category": "other", "text": "Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')", "title": "CWE-362" }, { "category": "other", "text": "Out-of-bounds Write", "title": "CWE-787" }, { "category": "description", "text": "A vulnerability in the HDA audio device model within the bhyve virtual machine allows malicious guests to exploit unchecked zero-length Buffer Descriptor List entries, leading to out-of-bounds memory access and potential arbitrary code execution in host userspace.", "title": "Summary" } ], "product_status": { "known_affected": [ "CSAFPID-1" ] }, "references": [ { "category": "self", "summary": "CVE-2026-101310 | NCSC-NL Website", "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-101310.json" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.0, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-1" ] } ], "title": "CVE-2026-101310" }, { "cve": "CVE-2026-101311", "cwe": { "id": "CWE-362", "name": "Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')" }, "notes": [ { "category": "other", "text": "Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')", "title": "CWE-362" }, { "category": "description", "text": "The framebuffer device model contained unsynchronized maximum resolution constants, lacked validation for width and height on writes, and had unsynchronized I/O and rendering threads, enabling a malicious guest to crash the bhyve process or execute arbitrary code in the host userspace within the Capsicum sandbox.", "title": "Summary" } ], "product_status": { "known_affected": [ "CSAFPID-1" ] }, "references": [ { "category": "self", "summary": "CVE-2026-101311 | NCSC-NL Website", "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-101311.json" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.0, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-1" ] } ], "title": "CVE-2026-101311" } ] }