{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-10672",
        "assignerOrgId": "e2e69745-5e70-4e92-8431-deb5529a81ad",
        "state": "PUBLISHED",
        "assignerShortName": "zephyr",
        "dateReserved": "2026-06-02T15:25:35.843Z",
        "datePublished": "2026-07-14T15:02:04.482Z",
        "dateUpdated": "2026-10-15T22:10:15.606Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "collectionURL": "https://github.com/zephyrproject-rtos/zephyr",
                    "defaultStatus": "unaffected",
                    "packageName": "zephyr",
                    "product": "zephyr",
                    "programFiles": [
                        "subsys/net/lib/lwm2m/lwm2m_pull_context.c"
                    ],
                    "vendor": "zephyrproject",
                    "versions": [
                        {
                            "lessThan": "4.3.1",
                            "status": "affected",
                            "version": "3.0.0",
                            "versionType": "semver"
                        },
                        {
                            "lessThan": "4.4.1",
                            "status": "affected",
                            "version": "4.4.0",
                            "versionType": "semver"
                        }
                    ]
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "subsys/net/lib/lwm2m/lwm2m_pull_context.c copied the firmware-update Package URI into a fixed static buffer (context.uri, size CONFIG_LWM2M_SWMGMT_PACKAGE_URI_LEN, default 128) with memcpy(context.uri, uri, LWM2M_PACKAGE_URI_LEN), copying exactly the destination size with no length validation. The Firmware-Update object stores the server-supplied Package URI (/5/0/1) in a 255-byte buffer, so a LwM2M management server (or an on-path attacker on a session lacking strong DTLS) can WRITE a URI of 128-254 characters; only the first 128 bytes are then copied into context.uri with no NUL terminator. That buffer is subsequently consumed as a C string by http_parser_parse_url(context.uri, strlen(context.uri), ...), strlen-based CoAP URI-path/PROXY-URI option appends, and lwm2m_parse_peerinfo(), causing an out-of-bounds read of adjacent static memory. The over-read bytes are appended to outbound CoAP requests (information disclosure of adjacent device memory to the server/proxy) and can crash the device (denial of service). The vulnerable copy was introduced by the pull-context refactor (first released in v3.0.0) and is present through v4.4.0; the default-on CONFIG_LWM2M_FIRMWARE_UPDATE_PULL_SUPPORT path is affected. The fix adds a strlen(uri) >= sizeof(context.uri) check returning -ENOMEM and switches to strcpy(), guaranteeing a bounded, NUL-terminated buffer."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "baseScore": 8.2,
                        "baseSeverity": "HIGH",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L",
                        "version": "3.1"
                    },
                    "format": "CVSS"
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-125",
                            "description": "bounds",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "name": "Fix commit",
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/zephyrproject-rtos/zephyr/commit/99a164df5cea5af76e32b57c6d51854f018969a2"
                },
                {
                    "name": "GHSA-rf6j-4mpp-j9mf",
                    "url": "https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-rf6j-4mpp-j9mf"
                }
            ],
            "title": "Unterminated URI buffer causes out-of-bounds read in LwM2M firmware pull (Package URI)",
            "x_generator": {
                "engine": "cvelib 1.8.0"
            },
            "providerMetadata": {
                "orgId": "e2e69745-5e70-4e92-8431-deb5529a81ad",
                "shortName": "zephyr",
                "dateUpdated": "2026-10-15T22:10:15.606Z"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-rf6j-4mpp-j9mf",
                        "tags": [
                            "exploit"
                        ]
                    }
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                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-07-14T15:28:04.126168Z",
                                "id": "CVE-2026-10672",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
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                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
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                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-07-14T15:28:37.269Z"
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}