CVE-2026-85068

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-85068", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-09-02T21:21:01.775Z", "datePublished": "2026-11-05T22:57:24.731Z", "dateUpdated": "2026-11-10T19:36:17.923Z"}, "containers": {"cna": {"title": "NUT blazer_usb ippon_command stack info-leak via unzeroed char tmp[64] in OUT-direction usb_control_msg", "problemTypes": [{"descriptions": [{"cweId": "CWE-457", "lang": "en", "description": "CWE-457: Use of Uninitialized Variable", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "PHYSICAL", "availabilityImpact": "NONE", "baseScore": 2.4, "baseSeverity": "LOW", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/networkupstools/nut/security/advisories/GHSA-fjxc-2vpv-mqc8", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/networkupstools/nut/security/advisories/GHSA-fjxc-2vpv-mqc8"}, {"name": "https://github.com/networkupstools/nut/pull/3529", "tags": ["x_refsource_MISC"], "url": "https://github.com/networkupstools/nut/pull/3529"}, {"name": "https://github.com/networkupstools/nut/commit/30d56d4282f823949b40763d5c76461c7dd107b3", "tags": ["x_refsource_MISC"], "url": "https://github.com/networkupstools/nut/commit/30d56d4282f823949b40763d5c76461c7dd107b3"}], "affected": [{"vendor": "networkupstools", "product": "nut", "versions": [{"version": ">= 2.4.2, <= 2.8.5", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-11-05T22:57:24.731Z"}, "descriptions": [{"lang": "en", "value": "Network UPS Tools is a collection of programs which provide a common interface for monitoring and administering UPS, PDU and SCD hardware. From 2.4.2 through 2.8.5, ippon_command in drivers/blazer_usb.c partially initializes char tmp[64] with a short Megatec status query and then passes a fixed eight-byte chunk to usb_control_msg. A malicious firmware-controlled USB device presenting the Mustek Powermust VID 0x06da and Mustek Powermust PID 0x0003 matches blazer_usb_id, selects ippon_subdriver, and can receive the uninitialized trailing stack bytes during normal polling. The disclosure is bounded and read-only, requires physical or supply-chain access to the USB bus, and has no established integrity or availability impact. This issue is scheduled to be fixed in version 2.8.6."}], "source": {"advisory": "GHSA-fjxc-2vpv-mqc8", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/networkupstools/nut/security/advisories/GHSA-fjxc-2vpv-mqc8", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-11-10T19:35:53.153950Z", "id": "CVE-2026-85068", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-10T19:36:17.923Z"}}]}}

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-85068", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-09-02T21:21:01.775Z", "datePublished": "2026-11-05T22:57:24.731Z", "dateUpdated": "2026-11-10T19:36:17.923Z"}, "containers": {"cna": {"title": "NUT blazer_usb ippon_command stack info-leak via unzeroed char tmp[64] in OUT-direction usb_control_msg", "problemTypes": [{"descriptions": [{"cweId": "CWE-457", "lang": "en", "description": "CWE-457: Use of Uninitialized Variable", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "PHYSICAL", "availabilityImpact": "NONE", "baseScore": 2.4, "baseSeverity": "LOW", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/networkupstools/nut/security/advisories/GHSA-fjxc-2vpv-mqc8", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/networkupstools/nut/security/advisories/GHSA-fjxc-2vpv-mqc8"}, {"name": "https://github.com/networkupstools/nut/pull/3529", "tags": ["x_refsource_MISC"], "url": "https://github.com/networkupstools/nut/pull/3529"}, {"name": "https://github.com/networkupstools/nut/commit/30d56d4282f823949b40763d5c76461c7dd107b3", "tags": ["x_refsource_MISC"], "url": "https://github.com/networkupstools/nut/commit/30d56d4282f823949b40763d5c76461c7dd107b3"}], "affected": [{"vendor": "networkupstools", "product": "nut", "versions": [{"version": ">= 2.4.2, <= 2.8.5", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-11-05T22:57:24.731Z"}, "descriptions": [{"lang": "en", "value": "Network UPS Tools is a collection of programs which provide a common interface for monitoring and administering UPS, PDU and SCD hardware. From 2.4.2 through 2.8.5, ippon_command in drivers/blazer_usb.c partially initializes char tmp[64] with a short Megatec status query and then passes a fixed eight-byte chunk to usb_control_msg. A malicious firmware-controlled USB device presenting the Mustek Powermust VID 0x06da and Mustek Powermust PID 0x0003 matches blazer_usb_id, selects ippon_subdriver, and can receive the uninitialized trailing stack bytes during normal polling. The disclosure is bounded and read-only, requires physical or supply-chain access to the USB bus, and has no established integrity or availability impact. This issue is scheduled to be fixed in version 2.8.6."}], "source": {"advisory": "GHSA-fjxc-2vpv-mqc8", "discovery": "UNKNOWN"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-85068", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-10T19:35:53.153950Z"}}}], "references": [{"url": "https://github.com/networkupstools/nut/security/advisories/GHSA-fjxc-2vpv-mqc8", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-10T19:36:04.767Z"}}]}}

{"affected": [{"affectedData": [{"product": "nut", "vendor": "networkupstools", "versions": [{"status": "affected", "version": ">= 2.4.2, <= 2.8.5"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Network UPS Tools is a collection of programs which provide a common interface for monitoring and administering UPS, PDU and SCD hardware. From 2.4.2 through 2.8.5, ippon_command in drivers/blazer_usb.c partially initializes char tmp[64] with a short Megatec status query and then passes a fixed eight-byte chunk to usb_control_msg. A malicious firmware-controlled USB device presenting the Mustek Powermust VID 0x06da and Mustek Powermust PID 0x0003 matches blazer_usb_id, selects ippon_subdriver, and can receive the uninitialized trailing stack bytes during normal polling. The disclosure is bounded and read-only, requires physical or supply-chain access to the USB bus, and has no established integrity or availability impact. This issue is scheduled to be fixed in version 2.8.6."}], "id": "CVE-2026-85068", "lastModified": "2026-11-12T22:18:51.470", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "PHYSICAL", "availabilityImpact": "NONE", "baseScore": 2.4, "baseSeverity": "LOW", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 0.9, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-85068", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-10T19:35:53.153950Z", "version": "2.0.3"}}]}, "published": "2026-11-05T23:17:00.947", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/networkupstools/nut/commit/30d56d4282f823949b40763d5c76461c7dd107b3"}, {"source": "security-advisories@github.com", "url": "https://github.com/networkupstools/nut/pull/3529"}, {"source": "security-advisories@github.com", "url": "https://github.com/networkupstools/nut/security/advisories/GHSA-fjxc-2vpv-mqc8"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/networkupstools/nut/security/advisories/GHSA-fjxc-2vpv-mqc8"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-457"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "nut: nut: Information disclosure via uninitialized stack memory in blazer_usb driver", "id": "2567980", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2567980"}, "csaw": false, "cvss3": {"cvss3_base_score": "2.4", "cvss3_scoring_vector": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-908", "details": ["A flaw was found in Network UPS Tools (NUT). When communicating with certain devices via the blazer_usb driver, fixed-size data packets are transmitted across the USB bus without completely initializing the memory buffer. An attacker with physical access can connect a malicious USB device to capture uninitialized stack memory during normal device polling, resulting in information disclosure."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-85068", "public_date": "2026-11-05T22:57:24Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-85068\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-85068\nhttps://github.com/networkupstools/nut/commit/30d56d4282f823949b40763d5c76461c7dd107b3\nhttps://github.com/networkupstools/nut/pull/3529\nhttps://github.com/networkupstools/nut/security/advisories/GHSA-fjxc-2vpv-mqc8"], "statement": "This vulnerability is rated as having Low severity for Red Hat because exploitation requires physical access or control over a locally attached USB device to capture leaked stack contents, resulting solely in limited information disclosure without integrity or availability consequences. In standard Red Hat enterprise environments, Network UPS Tools is not active by default and requires explicit administrator setup to monitor supported power hardware. Furthermore, the issue only triggers when the blazer_usb driver is actively communicating with a specific hardware profile or an emulated device presenting matching identifiers, significantly limiting practical exposure.", "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.4.2,2.8.5]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "nut", "source": "cna", "vendor": "networkupstools"}, "product": "nut", "vendor": "networkupstools"}], "created": "2026-11-06T00:30:18.423677+00:00", "updated": "2026-11-06T15:00:07.991021+00:00", "vendors": ["networkupstools", "networkupstools$PRODUCT$nut"]}