CVE-2026-43495

{"id": "CVE-2026-43495", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "da45d2566a1d4e260b894ff5d96be64b21c7fa79", "lessThan": "307c5d0f36a5c74042217136da5bfbd9f7504650", "versionType": "git"}, {"status": "affected", "version": "da45d2566a1d4e260b894ff5d96be64b21c7fa79", "lessThan": "f94450ce5053b36002995b72d1fa1db3bb08c5bf", "versionType": "git"}, {"status": "affected", "version": "da45d2566a1d4e260b894ff5d96be64b21c7fa79", "lessThan": "9855e063e063158cc5bded576382599dc3133202", "versionType": "git"}, {"status": "affected", "version": "da45d2566a1d4e260b894ff5d96be64b21c7fa79", "lessThan": "2b56d7903ab804481f5233a259d5f341e9fd513c", "versionType": "git"}, {"status": "affected", "version": "da45d2566a1d4e260b894ff5d96be64b21c7fa79", "lessThan": "dd4f4c93c1488d7100b9964f2da4c8b3c29652f1", "versionType": "git"}, {"status": "affected", "version": "da45d2566a1d4e260b894ff5d96be64b21c7fa79", "lessThan": "0e7c074cfcd9bd93765505f9eb8b42f03ed2a744", "versionType": "git"}], "programFiles": ["drivers/net/wwan/t7xx/t7xx_modem_ops.c", "drivers/net/wwan/t7xx/t7xx_port_ctrl_msg.c", "drivers/net/wwan/t7xx/t7xx_port_proxy.h"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.19"}, {"status": "unaffected", "version": "0", "lessThan": "5.19", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.176", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.140", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.88", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.30", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.7", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/net/wwan/t7xx/t7xx_modem_ops.c", "drivers/net/wwan/t7xx/t7xx_port_ctrl_msg.c", "drivers/net/wwan/t7xx/t7xx_port_proxy.h"], "defaultStatus": "affected"}]}], "published": "2026-05-21T13:16:18.847", "references": [{"url": "https://git.kernel.org/stable/c/0e7c074cfcd9bd93765505f9eb8b42f03ed2a744", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/2b56d7903ab804481f5233a259d5f341e9fd513c", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/307c5d0f36a5c74042217136da5bfbd9f7504650", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9855e063e063158cc5bded576382599dc3133202", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/dd4f4c93c1488d7100b9964f2da4c8b3c29652f1", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f94450ce5053b36002995b72d1fa1db3bb08c5bf", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "http://www.openwall.com/lists/oss-security/2026/06/18/1", "tags": ["Mailing List"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-125"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: wwan: t7xx: validate port_count against message length in t7xx_port_enum_msg_handler\n\nt7xx_port_enum_msg_handler() uses the modem-supplied port_count field as\na loop bound over port_msg->data[] without checking that the message buffer\ncontains sufficient data. A modem sending port_count=65535 in a 12-byte\nbuffer triggers a slab-out-of-bounds read of up to 262140 bytes.\n\nAdd a sizeof(*port_msg) check before accessing the port message header\nfields to guard against undersized messages.\n\nAdd a struct_size() check after extracting port_count and before the loop.\n\nIn t7xx_parse_host_rt_data(), guard the rt_feature header read with a\nremaining-buffer check before accessing data_len, validate feat_data_len\nagainst the actual remaining buffer to prevent OOB reads and signed\ninteger overflow on offset.\n\nPass msg_len from both call sites: skb->len at the DPMAIF path after\nskb_pull(), and the validated feat_data_len at the handshake path."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad:\n\nnet: wwan: t7xx: validar port_count contra la longitud del mensaje en t7xx_port_enum_msg_handler\n\nt7xx_port_enum_msg_handler() utiliza el campo port_count suministrado por el m\u00f3dem como l\u00edmite de bucle sobre port_msg->data[] sin verificar que el b\u00fafer del mensaje contenga datos suficientes. Un m\u00f3dem que env\u00eda port_count=65535 en un b\u00fafer de 12 bytes desencadena una lectura fuera de l\u00edmites de slab de hasta 262140 bytes.\n\nA\u00f1adir una verificaci\u00f3n sizeof(port_msg) antes de acceder a los campos de la cabecera del mensaje del puerto para proteger contra mensajes de tama\u00f1o insuficiente.\n\nA\u00f1adir una verificaci\u00f3n struct_size() despu\u00e9s de extraer port_count y antes del bucle.\n\nEn t7xx_parse_host_rt_data(), proteger la lectura de la cabecera rt_feature con una verificaci\u00f3n del b\u00fafer restante antes de acceder a data_len, validar feat_data_len contra el b\u00fafer restante real para prevenir lecturas OOB y desbordamiento de entero con signo en el desplazamiento.\n\nPasar msg_len desde ambos sitios de llamada: skb->len en la ruta DPMAIF despu\u00e9s de skb_pull(), y el feat_data_len validado en la ruta de handshake."}], "lastModified": "2026-07-23T16:10:00.137", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "190567C3-238F-444D-89B9-23420EE1EFFB", "versionEndExcluding": "6.1.176", "versionStartIncluding": "5.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A1A92866-F406-43B5-B2D1-CFC274753E9D", "versionEndExcluding": "6.6.140", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5AFBE0EC-CCDF-4207-AE92-ABF958125CA4", "versionEndExcluding": "6.12.88", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BF39AE08-AE6D-4410-8FBE-76F6BF5BF55B", "versionEndExcluding": "6.18.30", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D0893CA7-9AE6-4DFE-AC75-48967D73AD8E", "versionEndExcluding": "7.0.7", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}