CVE-2026-10636

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-10636", "assignerOrgId": "e2e69745-5e70-4e92-8431-deb5529a81ad", "state": "PUBLISHED", "assignerShortName": "zephyr", "dateReserved": "2026-06-02T15:10:53.319Z", "datePublished": "2026-06-16T13:12:58.205Z", "dateUpdated": "2026-11-04T04:58:05.617Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "e2e69745-5e70-4e92-8431-deb5529a81ad", "shortName": "zephyr", "dateUpdated": "2026-11-04T04:58:05.617Z"}, "title": "Use-after-free in Zephyr IPv4 IGMP send path (`igmp_send`)", "descriptions": [{"lang": "en", "value": "In Zephyr's IPv4 IGMP implementation, igmp_send() in subsys/net/ip/igmp.c read the network interface back out of the packet via net_pkt_iface(pkt) after the packet had been handed to net_send_data(). On the successful-send path the packet's last reference may already have been released by the L2 driver or by the network stack's TX handling (synchronously in the default NET_TC_TX_COUNT=0 immediate-transmit configuration), returning the net_pkt slab block to its free list. The subsequent net_pkt_iface(pkt) dereferences the freed packet, a use-after-free read; with CONFIG_NET_STATISTICS_PER_INTERFACE the resulting dangling interface pointer is further dereferenced for a statistics-counter write.\n\nThe IGMP send path is reachable without authentication from inbound IPv4 IGMP membership queries addressed to 224.0.0.1 (net_ipv4_igmp_input -> send_igmp_report/send_igmp_v3_report -> igmp_send), as well as from local multicast join/leave/rejoin operations.\n\nRealistic impact is undefined behavior and potential denial of service (sporadic crash or stats corruption); a controllable write requires the asynchronous TX path plus a concurrent slab reuse.\n\nThe flaw was introduced with IGMPv2 support and affects releases from v2.6.0 through v4.4.0. The fix caches the interface pointer before sending. Note the analogous IPv6 MLD path (mld_send in subsys/net/ip/ipv6_mld.c) retains the same unfixed pattern."}], "affected": [{"vendor": "zephyrproject", "product": "zephyr", "collectionURL": "https://github.com/zephyrproject-rtos/zephyr", "packageName": "zephyr", "defaultStatus": "unaffected", "programFiles": ["subsys/net/ip/igmp.c"], "versions": [{"version": "2.6.0", "status": "affected", "versionType": "semver", "lessThan": "4.3.1"}, {"version": "4.4.0", "status": "affected", "versionType": "semver", "lessThan": "4.4.1"}]}], "references": [{"url": "https://github.com/zephyrproject-rtos/zephyr/commit/0223e5e3ec5ebc51e8d0328fc3e604fa43552f54", "name": "Fix commit", "tags": ["patch"]}, {"url": "https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fj6q-975v-65c9", "name": "GHSA-fj6q-975v-65c9"}], "metrics": [{"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "baseScore": 3.7, "baseSeverity": "LOW"}}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "use-after-free", "cweId": "CWE-416", "type": "CWE"}]}], "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-06-16T15:30:53.213579Z", "id": "CVE-2026-10636", "options": [{"Exploitation": "none"}, {"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": "2026-06-16T15:30:59.821Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-10636", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-16T15:30:53.213579Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-16T15:30:56.654Z"}}], "cna": {"title": "Use-after-free in Zephyr IPv4 IGMP send path (`igmp_send`)", "metrics": [{"format": "CVSS", "cvssV3_1": {"version": "3.1", "baseScore": 3.7, "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"}}], "affected": [{"vendor": "zephyrproject", "product": "zephyr", "versions": [{"status": "affected", "version": "2.6.0", "lessThan": "4.3.1", "versionType": "semver"}, {"status": "affected", "version": "4.4.0", "lessThan": "4.4.1", "versionType": "semver"}], "packageName": "zephyr", "programFiles": ["subsys/net/ip/igmp.c"], "collectionURL": "https://github.com/zephyrproject-rtos/zephyr", "defaultStatus": "unaffected"}], "references": [{"url": "https://github.com/zephyrproject-rtos/zephyr/commit/0223e5e3ec5ebc51e8d0328fc3e604fa43552f54", "name": "Fix commit", "tags": ["patch"]}, {"url": "https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fj6q-975v-65c9", "name": "GHSA-fj6q-975v-65c9"}], "x_generator": {"engine": "cvelib 1.8.0"}, "descriptions": [{"lang": "en", "value": "In Zephyr's IPv4 IGMP implementation, igmp_send() in subsys/net/ip/igmp.c read the network interface back out of the packet via net_pkt_iface(pkt) after the packet had been handed to net_send_data(). On the successful-send path the packet's last reference may already have been released by the L2 driver or by the network stack's TX handling (synchronously in the default NET_TC_TX_COUNT=0 immediate-transmit configuration), returning the net_pkt slab block to its free list. The subsequent net_pkt_iface(pkt) dereferences the freed packet, a use-after-free read; with CONFIG_NET_STATISTICS_PER_INTERFACE the resulting dangling interface pointer is further dereferenced for a statistics-counter write.\n\nThe IGMP send path is reachable without authentication from inbound IPv4 IGMP membership queries addressed to 224.0.0.1 (net_ipv4_igmp_input -> send_igmp_report/send_igmp_v3_report -> igmp_send), as well as from local multicast join/leave/rejoin operations.\n\nRealistic impact is undefined behavior and potential denial of service (sporadic crash or stats corruption); a controllable write requires the asynchronous TX path plus a concurrent slab reuse.\n\nThe flaw was introduced with IGMPv2 support and affects releases from v2.6.0 through v4.4.0. The fix caches the interface pointer before sending. Note the analogous IPv6 MLD path (mld_send in subsys/net/ip/ipv6_mld.c) retains the same unfixed pattern."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "use-after-free"}]}], "providerMetadata": {"orgId": "e2e69745-5e70-4e92-8431-deb5529a81ad", "shortName": "zephyr", "dateUpdated": "2026-11-04T04:58:05.617Z"}}}, "cveMetadata": {"cveId": "CVE-2026-10636", "state": "PUBLISHED", "dateUpdated": "2026-11-04T04:58:05.617Z", "dateReserved": "2026-06-02T15:10:53.319Z", "assignerOrgId": "e2e69745-5e70-4e92-8431-deb5529a81ad", "datePublished": "2026-06-16T13:12:58.205Z", "assignerShortName": "zephyr"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"collectionURL": "https://github.com/zephyrproject-rtos/zephyr", "defaultStatus": "unaffected", "packageName": "zephyr", "product": "zephyr", "programFiles": ["subsys/net/ip/igmp.c"], "vendor": "zephyrproject", "versions": [{"lessThan": "4.3.1", "status": "affected", "version": "2.6.0", "versionType": "semver"}, {"lessThan": "4.4.1", "status": "affected", "version": "4.4.0", "versionType": "semver"}]}], "source": "vulnerabilities@zephyrproject.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:*", "matchCriteriaId": "20060992-9413-4D30-A6CD-598A9F4576E9", "versionEndExcluding": "4.5.0", "versionStartIncluding": "2.6.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In Zephyr's IPv4 IGMP implementation, igmp_send() in subsys/net/ip/igmp.c read the network interface back out of the packet via net_pkt_iface(pkt) after the packet had been handed to net_send_data(). On the successful-send path the packet's last reference may already have been released by the L2 driver or by the network stack's TX handling (synchronously in the default NET_TC_TX_COUNT=0 immediate-transmit configuration), returning the net_pkt slab block to its free list. The subsequent net_pkt_iface(pkt) dereferences the freed packet, a use-after-free read; with CONFIG_NET_STATISTICS_PER_INTERFACE the resulting dangling interface pointer is further dereferenced for a statistics-counter write.\n\nThe IGMP send path is reachable without authentication from inbound IPv4 IGMP membership queries addressed to 224.0.0.1 (net_ipv4_igmp_input -> send_igmp_report/send_igmp_v3_report -> igmp_send), as well as from local multicast join/leave/rejoin operations.\n\nRealistic impact is undefined behavior and potential denial of service (sporadic crash or stats corruption); a controllable write requires the asynchronous TX path plus a concurrent slab reuse.\n\nThe flaw was introduced with IGMPv2 support and affects releases from v2.6.0 through v4.4.0. The fix caches the interface pointer before sending. Note the analogous IPv6 MLD path (mld_send in subsys/net/ip/ipv6_mld.c) retains the same unfixed pattern."}, {"lang": "es", "value": "En la implementaci\u00f3n de IGMP IPv4 de Zephyr, igmp_send() en subsys/net/ip/igmp.c le\u00eda la interfaz de red del paquete a trav\u00e9s de net_pkt_iface(pkt) despu\u00e9s de que el paquete hab\u00eda sido entregado a net_send_data(). En la ruta de env\u00edo exitoso, la \u00faltima referencia del paquete ya podr\u00eda haber sido liberada por el controlador L2 o por el manejo TX de la pila de red (sincr\u00f3nicamente en la configuraci\u00f3n predeterminada de transmisi\u00f3n inmediata NET_TC_TX_COUNT=0), devolviendo el bloque slab net_pkt a su lista de libres. La subsiguiente net_pkt_iface(pkt) desreferencia el paquete liberado, una lectura de uso despu\u00e9s de liberaci\u00f3n; con CONFIG_NET_STATISTICS_PER_INTERFACE, el puntero de interfaz colgante resultante es desreferenciado a\u00fan m\u00e1s para una escritura de contador de estad\u00edsticas. La ruta de env\u00edo de IGMP es alcanzable sin autenticaci\u00f3n desde consultas de membres\u00eda IGMP IPv4 entrantes dirigidas a 224.0.0.1 (net_ipv4_igmp_input - send_igmp_report/send_igmp_v3_report - igmp_send), as\u00ed como desde operaciones locales de uni\u00f3n/salida/reuni\u00f3n de multidifusi\u00f3n. El impacto realista es un comportamiento indefinido y una potencial denegaci\u00f3n de servicio (fallo espor\u00e1dico o corrupci\u00f3n de estad\u00edsticas); una escritura controlable requiere la ruta TX as\u00edncrona m\u00e1s una reutilizaci\u00f3n concurrente del slab. La falla fue introducida con el soporte de IGMPv2 y afecta a las versiones desde la v2.6.0 hasta la v4.4.0. La soluci\u00f3n almacena en cach\u00e9 el puntero de interfaz antes de enviar. Tenga en cuenta que la ruta an\u00e1loga de MLD IPv6 (mld_send en subsys/net/ip/ipv6_mld.c) conserva el mismo patr\u00f3n sin corregir."}], "id": "CVE-2026-10636", "lastModified": "2026-10-25T23:10:00.167", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 1.4, "source": "vulnerabilities@zephyrproject.org", "type": "Secondary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-10636", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-16T15:30:53.213579Z", "version": "2.0.3"}}]}, "published": "2026-06-16T15:16:33.867", "references": [{"source": "vulnerabilities@zephyrproject.org", "tags": ["Patch"], "url": "https://github.com/zephyrproject-rtos/zephyr/commit/0223e5e3ec5ebc51e8d0328fc3e604fa43552f54"}, {"source": "vulnerabilities@zephyrproject.org", "tags": ["Exploit", "Patch", "Vendor Advisory"], "url": "https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fj6q-975v-65c9"}], "sourceIdentifier": "vulnerabilities@zephyrproject.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "vulnerabilities@zephyrproject.org", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.6.0,4.5.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "zephyr", "source": "cna", "vendor": "zephyrproject"}, "product": "zephyr", "vendor": "zephyrproject"}], "created": "2026-06-16T16:30:16.702725+00:00", "updated": "2026-07-31T17:15:03.767512+00:00", "vendors": ["zephyrproject", "zephyrproject$PRODUCT$zephyr"]}