CVE-2026-31500

{"id": "CVE-2026-31500", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-31500", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-05T21:35:57.538533Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "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": "973bb97e5aee56edddaae3d5c96877101ad509c0", "lessThan": "7e041d0aad1d4d43d921ace052e04f4e2cacaed3", "versionType": "git"}, {"status": "affected", "version": "973bb97e5aee56edddaae3d5c96877101ad509c0", "lessThan": "5f84e845648dfa86e42de5487f1a774b42f0444d", "versionType": "git"}, {"status": "affected", "version": "973bb97e5aee56edddaae3d5c96877101ad509c0", "lessThan": "e10a4cb72468686ffbe8bb2b0520e37f6be1a0c5", "versionType": "git"}, {"status": "affected", "version": "973bb97e5aee56edddaae3d5c96877101ad509c0", "lessThan": "66696648af477dc87859e5e4b607112f5f29d010", "versionType": "git"}, {"status": "affected", "version": "973bb97e5aee56edddaae3d5c96877101ad509c0", "lessThan": "f7d84737663ad4a120d2d8ef1561a4df91282c2e", "versionType": "git"}, {"status": "affected", "version": "973bb97e5aee56edddaae3d5c96877101ad509c0", "lessThan": "94d8e6fe5d0818e9300e514e095a200bd5ff93ae", "versionType": "git"}], "programFiles": ["drivers/bluetooth/btintel.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.3"}, {"status": "unaffected", "version": "0", "lessThan": "4.3", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.175", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.131", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.80", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.21", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.11", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/bluetooth/btintel.c"], "defaultStatus": "affected"}]}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "affectedData": [{"vendor": "Siemens", "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem", "versions": [{"status": "affected", "version": "0", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}]}], "published": "2026-04-22T14:16:48.427", "references": [{"url": "https://git.kernel.org/stable/c/5f84e845648dfa86e42de5487f1a774b42f0444d", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/66696648af477dc87859e5e4b607112f5f29d010", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/7e041d0aad1d4d43d921ace052e04f4e2cacaed3", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/94d8e6fe5d0818e9300e514e095a200bd5ff93ae", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e10a4cb72468686ffbe8bb2b0520e37f6be1a0c5", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f7d84737663ad4a120d2d8ef1561a4df91282c2e", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html", "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btintel: serialize btintel_hw_error() with hci_req_sync_lock\n\nbtintel_hw_error() issues two __hci_cmd_sync() calls (HCI_OP_RESET\nand Intel exception-info retrieval) without holding\nhci_req_sync_lock(). This lets it race against\nhci_dev_do_close() -> btintel_shutdown_combined(), which also runs\n__hci_cmd_sync() under the same lock. When both paths manipulate\nhdev->req_status/req_rsp concurrently, the close path may free the\nresponse skb first, and the still-running hw_error path hits a\nslab-use-after-free in kfree_skb().\n\nWrap the whole recovery sequence in hci_req_sync_lock/unlock so it\nis serialized with every other synchronous HCI command issuer.\n\nBelow is the data race report and the kasan report:\n\n BUG: data-race in __hci_cmd_sync_sk / btintel_shutdown_combined\n\n read of hdev->req_rsp at net/bluetooth/hci_sync.c:199\n by task kworker/u17:1/83:\n __hci_cmd_sync_sk+0x12f2/0x1c30 net/bluetooth/hci_sync.c:200\n __hci_cmd_sync+0x55/0x80 net/bluetooth/hci_sync.c:223\n btintel_hw_error+0x114/0x670 drivers/bluetooth/btintel.c:254\n hci_error_reset+0x348/0xa30 net/bluetooth/hci_core.c:1030\n\n write/free by task ioctl/22580:\n btintel_shutdown_combined+0xd0/0x360\n drivers/bluetooth/btintel.c:3648\n hci_dev_close_sync+0x9ae/0x2c10 net/bluetooth/hci_sync.c:5246\n hci_dev_do_close+0x232/0x460 net/bluetooth/hci_core.c:526\n\n BUG: KASAN: slab-use-after-free in\n sk_skb_reason_drop+0x43/0x380 net/core/skbuff.c:1202\n Read of size 4 at addr ffff888144a738dc\n by task kworker/u17:1/83:\n __hci_cmd_sync_sk+0x12f2/0x1c30 net/bluetooth/hci_sync.c:200\n __hci_cmd_sync+0x55/0x80 net/bluetooth/hci_sync.c:223\n btintel_hw_error+0x186/0x670 drivers/bluetooth/btintel.c:260"}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nBluetooth: btintel: serializar btintel_hw_error() con hci_req_sync_lock\n\nbtintel_hw_error() emite dos llamadas a __hci_cmd_sync() (HCI_OP_RESET y recuperaci\u00f3n de informaci\u00f3n de excepci\u00f3n de Intel) sin mantener hci_req_sync_lock(). Esto permite que compita contra hci_dev_do_close() -> btintel_shutdown_combined(), que tambi\u00e9n ejecuta __hci_cmd_sync() bajo el mismo bloqueo. Cuando ambas rutas manipulan hdev -> req_status/req_rsp concurrentemente, la ruta de cierre puede liberar el skb de respuesta primero, y la ruta hw_error a\u00fan en ejecuci\u00f3n encuentra un uso despu\u00e9s de liberaci\u00f3n de slab en kfree_skb().\n\nEncapsular toda la secuencia de recuperaci\u00f3n en hci_req_sync_lock/unlock para que se serialice con cualquier otro emisor de comandos HCI s\u00edncronos.\n\nA continuaci\u00f3n se presenta el informe de condici\u00f3n de carrera y el informe kasan:\n\n ERROR: condici\u00f3n de carrera en __hci_cmd_sync_sk / btintel_shutdown_combined\n\n lectura de hdev -> req_rsp en net/bluetooth/hci_sync.c:199\n por la tarea kworker/u17:1/83:\n __hci_cmd_sync_sk+0x 12f2/0x 1c30 net/bluetooth/hci_sync.c:200\n __hci_cmd_sync+0x55/0x80 net/bluetooth/hci_sync.c:223\n btintel_hw_error+0x114/0x670 drivers/bluetooth/btintel.c:254\n hci_error_reset+0x348/0xa30 net/bluetooth/hci_core.c:1030\n\n escritura/liberaci\u00f3n por la tarea ioctl/22580:\n btintel_shutdown_combined+0xd0/0x360\n drivers/bluetooth/btintel.c:3648\n hci_dev_close_sync+0x9ae/0x 2c10 net/bluetooth/hci_sync.c:5246\n hci_dev_do_close+0x232/0x460 net/bluetooth/hci_core.c:526\n\n ERROR: KASAN: uso despu\u00e9s de liberaci\u00f3n de slab en\n sk_skb_reason_drop+0x43/0x380 net/core/skbuff.c:1202\n Lectura de tama\u00f1o 4 en la direcci\u00f3n ffff888144a738dc\n por la tarea kworker/u17:1/83:\n __hci_cmd_sync_sk+0x 12f2/0x 1c30 net/bluetooth/hci_sync.c:200\n __hci_cmd_sync+0x55/0x80 net/bluetooth/hci_sync.c:223\n btintel_hw_error+0x186/0x670 drivers/bluetooth/btintel.c:260"}], "lastModified": "2026-11-11T23:10:00.263", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "13A272C2-FFCB-4269-8944-00DFA555EB6F", "versionEndExcluding": "6.6.131", "versionStartIncluding": "4.3.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "97EB19EC-A11E-49C6-9D2F-6F6EC6CB98B6", "versionEndExcluding": "6.12.80", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "ED39847A-3B46-4729-B7CA-B2C30B9FA8FE", "versionEndExcluding": "6.18.21", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4CA2E747-A9EC-4518-9AA2-B4247FC748B7", "versionEndExcluding": "6.19.11", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:4.3:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5419A247-F671-44D6-9848-35264FDCD816"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "512EE3A8-A590-4501-9A94-5D4B268D6138"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}