{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-40213", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.179Z", "datePublished": "2025-11-24T15:59:44.000Z", "dateUpdated": "2026-08-05T12:08:38.482Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:08:38.482Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: MGMT: fix crash in set_mesh_sync and set_mesh_complete\n\nThere is a BUG: KASAN: stack-out-of-bounds in set_mesh_sync due to\nmemcpy from badly declared on-stack flexible array.\n\nAnother crash is in set_mesh_complete() due to double list_del via\nmgmt_pending_valid + mgmt_pending_remove.\n\nUse DEFINE_FLEX to declare the flexible array right, and don't memcpy\noutside bounds.\n\nAs mgmt_pending_valid removes the cmd from list, use mgmt_pending_free,\nand also report status on error." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerability is triggered entirely through a local AF_BLUETOOTH HCI control (mgmt) socket by sending a MGMT_OP_SET_MESH_RECEIVER command via sendmsg(); no over-the-air interaction is needed to reach or corrupt memory.\nAC:L - Both defects fire deterministically — any SET_MESH_RECEIVER with param_len > 6 causes the stack out-of-bounds read, and every successful completion hits the double list_del; the optional sock use-after-free variant is a race whose both sides (issuing the command and closing the mgmt fd) are fully attacker-controlled.\nPR:L - Requires a trusted mgmt socket (CAP_NET_ADMIN), the privilege level held by the ordinary non-root Bluetooth daemon on Linux desktops and by Android's sandboxed bluetooth process, so a compromised Bluetooth stack — itself remotely attackable — reaches this with low effective privilege.\nUI:N - The attacker issues the management command directly and no victim action, configuration change, or interaction is required.\nS:U - The out-of-bounds access, list corruption and freed-socket reuse all occur within the kernel's own security authority with no crossing of a VM, IOMMU or sandbox boundary.\nC:H - Up to 16 bytes of adjacent kernel stack are copied into the persistent hdev->mesh_ad_types filter and can be read back byte-by-byte through the mesh_device_found() advertisement-forwarding oracle, and the use-after-free on the released sock additionally exposes reclaimed slab contents.\nI:H - The second list_del writes through LIST_POISON pointers, and the premature sock_put lets mgmt_cmd_complete() write into a freed, sprayable hci_pinfo/sock object (sk_receive_queue, sk_data_ready), which is a control-flow hijack primitive rather than a bounded modification.\nA:H - The double list_del reliably oopses on poison-pointer dereference (or WARNs under CONFIG_DEBUG_LIST), the stack out-of-bounds read is a hard KASAN BUG, and the error path leaks the cmd, its parameters and a socket reference on every failure." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/net/bluetooth/mgmt.h", "net/bluetooth/mgmt.c" ], "versions": [ { "version": "d71b98f253b079cbadc83266383f26fe7e9e103b", "lessThan": "5c19daa93d9af29f1f46251b47e1ea66bcc8d679", "status": "affected", "versionType": "git" }, { "version": "302a1f674c00dd5581ab8e493ef44767c5101aab", "lessThan": "1c9aca1787e8395a2c59fef20e914467958969c5", "status": "affected", "versionType": "git" }, { "version": "302a1f674c00dd5581ab8e493ef44767c5101aab", "lessThan": "e8785404de06a69d89dcdd1e9a0b6ea42dc6d327", "status": "affected", "versionType": "git" }, { "version": "0b60eb04b8524e1b4b3f07fea0d16fda9a677d9a", "status": "affected", "versionType": "git" }, { "version": "87a1f16f07c6c43771754075e08f45b41d237421", "status": "affected", "versionType": "git" }, { "version": "6.6.140", "lessThan": "6.7", "status": "affected", "versionType": "semver" }, { "version": "6.16.10", "lessThan": "6.17", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/net/bluetooth/mgmt.h", "net/bluetooth/mgmt.c" ], "versions": [ { "version": "6.17", "status": "affected" }, { "version": "0", "lessThan": "6.17", "status": "unaffected", "versionType": "semver" }, { "version": "6.17.8", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17", "versionEndExcluding": "6.17.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17", "versionEndExcluding": "6.18" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.140" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16.10" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/5c19daa93d9af29f1f46251b47e1ea66bcc8d679" }, { "url": "https://git.kernel.org/stable/c/1c9aca1787e8395a2c59fef20e914467958969c5" }, { "url": "https://git.kernel.org/stable/c/e8785404de06a69d89dcdd1e9a0b6ea42dc6d327" } ], "title": "Bluetooth: MGMT: fix crash in set_mesh_sync and set_mesh_complete", "x_generator": { "engine": "bippy-1.2.0" } } } }