{ "document": { "category": "csaf_base", "csaf_version": "2.0", "distribution": { "tlp": { "label": "WHITE" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal 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 real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-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 the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings." } ], "publisher": { "category": "coordinator", "contact_details": "cert@ncsc.nl", "name": "National Cyber Security Centre", "namespace": "https://www.ncsc.nl/" }, "title": "CVE-2026-10642", "tracking": { "current_release_date": "2026-09-06T15:02:41.449006Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-10642", "initial_release_date": "2026-06-24T22:35:22.751808Z", "revision_history": [ { "date": "2026-06-24T22:35:22.751808Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)." }, { "date": "2026-06-24T22:35:26.744719Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-06-24T22:39:10.500503Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (2).| CWES updated (1)." }, { "date": "2026-06-24T22:39:12.442493Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-06-25T14:37:55.502096Z", "number": "5", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-06-25T14:38:04.612760Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-06-25T14:51:49.173410Z", "number": "7", "summary": "Unknown change." }, { "date": "2026-07-02T15:01:17.472021Z", "number": "8", "summary": "Products connected (1).| Product Identifiers created (1).| Exploits created (1)." }, { "date": "2026-07-02T15:01:27.525426Z", "number": "9", "summary": "NCSC Score updated." }, { "date": "2026-07-10T15:41:48.625951Z", "number": "10", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-07-10T15:41:50.295818Z", "number": "11", "summary": "NCSC Score updated." }, { "date": "2026-07-13T07:46:32.051465Z", "number": "12", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (12).| References created (4).| CWES updated (1)." }, { "date": "2026-07-13T07:46:41.116734Z", "number": "13", "summary": "NCSC Score updated." }, { "date": "2026-07-14T20:04:45.992028Z", "number": "14", "summary": "Description removed for source.| Description created for source.| CVSS updated." }, { "date": "2026-07-14T20:04:48.254054Z", "number": "15", "summary": "NCSC Score updated." }, { "date": "2026-07-14T20:18:07.398345Z", "number": "16", "summary": "Description removed for source.| Description created for source.| CVSS updated." }, { "date": "2026-07-15T09:04:41.922607Z", "number": "17", "summary": "Description removed for source.| Description created for source.| CVSS updated." }, { "date": "2026-08-11T15:11:53.467856Z", "number": "18", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-08-11T15:13:07.256631Z", "number": "19", "summary": "NCSC Score updated." }, { "date": "2026-09-02T10:45:46.473302Z", "number": "20", "summary": "EPSS updated." }, { "date": "2026-09-02T23:34:59.479169Z", "number": "21", "summary": "NCSC Score updated." }, { "date": "2026-09-03T14:38:16.790658Z", "number": "22", "summary": "EPSS updated." }, { "date": "2026-09-03T19:01:41.987401Z", "number": "23", "summary": "EPSS updated." }, { "date": "2026-09-04T15:47:42.445062Z", "number": "24", "summary": "EPSS updated." }, { "date": "2026-09-05T03:59:21.360735Z", "number": "25", "summary": "NCSC Score updated." }, { "date": "2026-09-05T15:45:35.051840Z", "number": "26", "summary": "EPSS updated." } ], "status": "interim", "version": "26" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:semver/4.1.0|<4.5.0", "product": { "name": "vers:semver/4.1.0|<4.5.0", "product_id": "CSAFPID-8495041" } }, { "category": "product_version_range", "name": "vers:unknown/>=4.1.0|<4.5.0", "product": { "name": "vers:unknown/>=4.1.0|<4.5.0", "product_id": "CSAFPID-8523493", "product_identification_helper": { "cpe": "cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "Zephyr" } ], "category": "vendor", "name": "Zephyrproject" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/v4.1.0", "product": { "name": "vers:unknown/v4.1.0", "product_id": "CSAFPID-5604267" } }, { "category": "product_version_range", "name": "vers:unknown/v4.2.0", "product": { "name": "vers:unknown/v4.2.0", "product_id": "CSAFPID-8566770" } }, { "category": "product_version_range", "name": "vers:unknown/v4.2.0-rc1", "product": { "name": "vers:unknown/v4.2.0-rc1", "product_id": "CSAFPID-8566773" } }, { "category": "product_version_range", "name": "vers:unknown/v4.2.0-rc2", "product": { "name": "vers:unknown/v4.2.0-rc2", "product_id": "CSAFPID-8566772" } }, { "category": "product_version_range", "name": "vers:unknown/v4.2.0-rc3", "product": { "name": "vers:unknown/v4.2.0-rc3", "product_id": "CSAFPID-8566771" } }, { "category": "product_version_range", "name": "vers:unknown/v4.3.0", "product": { "name": "vers:unknown/v4.3.0", "product_id": "CSAFPID-8570147" } }, { "category": "product_version_range", "name": "vers:unknown/v4.3.0-rc1", "product": { "name": "vers:unknown/v4.3.0-rc1", "product_id": "CSAFPID-8570150" } }, { "category": "product_version_range", "name": "vers:unknown/v4.3.0-rc2", "product": { "name": "vers:unknown/v4.3.0-rc2", "product_id": "CSAFPID-8570149" } }, { "category": "product_version_range", "name": "vers:unknown/v4.3.0-rc3", "product": { "name": "vers:unknown/v4.3.0-rc3", "product_id": "CSAFPID-8570148" } }, { "category": "product_version_range", "name": "vers:unknown/v4.4.0-rc1", "product": { "name": "vers:unknown/v4.4.0-rc1", "product_id": "CSAFPID-8570146" } }, { "category": "product_version_range", "name": "vers:unknown/v4.4.0-rc2", "product": { "name": "vers:unknown/v4.4.0-rc2", "product_id": "CSAFPID-8570145" } }, { "category": "product_version_range", "name": "vers:unknown/v4.4.0-rc3", "product": { "name": "vers:unknown/v4.4.0-rc3", "product_id": "CSAFPID-8570144" } } ], "category": "product_name", "name": "zephyr" } ], "category": "vendor", "name": "zephyrproject-rtos" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-10642", "cwe": { "id": "CWE-835", "name": "Loop with Unreachable Exit Condition ('Infinite Loop')" }, "notes": [ { "category": "description", "text": "The Zephyr PL011 UART driver (drivers/serial/uart_pl011.c) contains an unbounded software loop in pl011_irq_tx_enable() that repeatedly invokes the interrupt-driven application callback while the TX interrupt mask bit (PL011_IMSC_TXIM) is set, to work around the controller's level-transition TX-interrupt behavior.\n\nWhen CTS hardware flow control is enabled (devicetree hw-flow-control or runtime UART_CFG_FLOW_CTRL_RTS_CTS) and the wired serial peer de-asserts CTS, the controller stops draining the TX FIFO; pl011_fifo_fill() then returns 0 on every call while the application still has pending data and therefore never disables the TX interrupt. The loop condition never clears, so the thread that called uart_irq_tx_enable() (e.g. h4_send() in the Bluetooth HCI H4 driver) spins indefinitely, hanging the executing context and stalling the transport — a denial of service (CWE-835).\n\nAn attacker controlling the device attached to the UART's CTS line can trigger the hang by withholding CTS during transmission. Because that peer is the device wired to the UART — which may be a removable or external module (e.g. an off-board Bluetooth controller on the HCI H4 link) rather than a permanently-bonded on-PCB part — the attack vector is scored Adjacent (AV:A) rather than Physical; the security subcommittee should confirm the vector against the specific deployment. Impact is availability only; there is no memory-safety, confidentiality, or integrity consequence.\n\nThe vulnerable loop was introduced in commit b783bc8448ef (Feb 2025) and shipped in releases v4.1.0 through v4.4.0. The fix breaks out of the loop when CTS is blocking and arms the CTS modem-status interrupt to resume transmission when CTS re-asserts.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/10xxx/CVE-2026-10642.json" }, { "category": "description", "text": "The Zephyr PL011 UART driver (drivers/serial/uart_pl011.c) contains an unbounded software loop in pl011_irq_tx_enable() that repeatedly invokes the interrupt-driven application callback while the TX interrupt mask bit (PL011_IMSC_TXIM) is set, to work around the controller's level-transition TX-interrupt behavior.\n\nWhen CTS hardware flow control is enabled (devicetree hw-flow-control or runtime UART_CFG_FLOW_CTRL_RTS_CTS) and the wired serial peer de-asserts CTS, the controller stops draining the TX FIFO; pl011_fifo_fill() then returns 0 on every call while the application still has pending data and therefore never disables the TX interrupt. The loop condition never clears, so the thread that called uart_irq_tx_enable() (e.g. h4_send() in the Bluetooth HCI H4 driver) spins indefinitely, hanging the executing context and stalling the transport — a denial of service (CWE-835).\n\nAn attacker controlling the device attached to the UART's CTS line can trigger the hang by withholding CTS during transmission. Because that peer is the device wired to the UART — which may be a removable or external module (e.g. an off-board Bluetooth controller on the HCI H4 link) rather than a permanently-bonded on-PCB part — the attack vector is scored Adjacent (AV:A) rather than Physical; the security subcommittee should confirm the vector against the specific deployment. Impact is availability only; there is no memory-safety, confidentiality, or integrity consequence.\n\nThe vulnerable loop was introduced in commit b783bc8448ef (Feb 2025) and shipped in releases v4.1.0 through v4.4.0. The fix breaks out of the loop when CTS is blocking and arms the CTS modem-status interrupt to resume transmission when CTS re-asserts.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-10642" }, { "category": "description", "text": "The Zephyr PL011 UART driver (drivers/serial/uart_pl011.c) contains an unbounded software loop in pl011_irq_tx_enable() that repeatedly invokes the interrupt-driven application callback while the TX interrupt mask bit (PL011_IMSC_TXIM) is set, to work around the controller's level-transition TX-interrupt behavior.\n\nWhen CTS hardware flow control is enabled (devicetree hw-flow-control or runtime UART_CFG_FLOW_CTRL_RTS_CTS) and the wired serial peer de-asserts CTS, the controller stops draining the TX FIFO; pl011_fifo_fill() then returns 0 on every call while the application still has pending data and therefore never disables the TX interrupt. The loop condition never clears, so the thread that called uart_irq_tx_enable() (e.g. h4_send() in the Bluetooth HCI H4 driver) spins indefinitely, hanging the executing context and stalling the transport — a denial of service (CWE-835).\n\nAn attacker controlling the device attached to the UART's CTS line can trigger the hang by withholding CTS during transmission. Because that peer is the device wired to the UART — which may be a removable or external module (e.g. an off-board Bluetooth controller on the HCI H4 link) rather than a permanently-bonded on-PCB part — the attack vector is scored Adjacent (AV:A) rather than Physical; the security subcommittee should confirm the vector against the specific deployment. Impact is availability only; there is no memory-safety, confidentiality, or integrity consequence.\n\nThe vulnerable loop was introduced in commit b783bc8448ef (Feb 2025) and shipped in releases v4.1.0 through v4.4.0. The fix breaks out of the loop when CTS is blocking and arms the CTS modem-status interrupt to resume transmission when CTS re-asserts.", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-10642.json?alt=media" }, { "category": "other", "text": "0.00243", "title": "EPSS" }, { "category": "other", "text": "3.5", "title": "NCSC Score" }, { "category": "other", "text": "Is related to an uncommon product vendor, Is related to (a version of) an uncommon product, There is exploit data available from source Nvd", "title": "NCSC Score top decreasing factors" } ], "product_status": { "known_affected": [ "CSAFPID-8495041", "CSAFPID-8523493", "CSAFPID-5604267", "CSAFPID-8566770", "CSAFPID-8566771", "CSAFPID-8566772", "CSAFPID-8566773", "CSAFPID-8570144", "CSAFPID-8570145", "CSAFPID-8570146", "CSAFPID-8570147", "CSAFPID-8570148", "CSAFPID-8570149", "CSAFPID-8570150" ] }, "references": [ { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-10642" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/10xxx/CVE-2026-10642.json" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-10642.json?alt=media" }, { "category": "external", "summary": "Source - ncscclear", "url": "https://vulnerabilities.ncsc.nl/manual/CVE-2026-10642" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd; osv", "url": "https://github.com/zephyrproject-rtos/zephyr/commit/68e702294b711eadfe7b4fadedd46d7c87fe8f3d" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd; osv", "url": "https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3fgh-73jh-2q5j" }, { "category": "external", "summary": "Reference - osv", "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/10xxx/CVE-2026-10642.json" }, { "category": "external", "summary": "Reference - osv", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-10642" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 4.6, "baseSeverity": "MEDIUM" }, "products": [ "CSAFPID-5604267", "CSAFPID-8495041", "CSAFPID-8523493", "CSAFPID-8566770", "CSAFPID-8566771", "CSAFPID-8566772", "CSAFPID-8566773", "CSAFPID-8570144", "CSAFPID-8570145", "CSAFPID-8570146", "CSAFPID-8570147", "CSAFPID-8570148", "CSAFPID-8570149", "CSAFPID-8570150" ] } ], "title": "CVE-2026-10642" } ] }