228 lines
12 KiB
JSON
228 lines
12 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2025-68304",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2025-12-16T14:48:05.294Z",
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"datePublished": "2025-12-16T15:06:21.887Z",
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"dateUpdated": "2026-10-15T22:02:48.882Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T12:10:46.641Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_core: lookup hci_conn on RX path on protocol side\n\nThe hdev lock/lookup/unlock/use pattern in the packet RX path doesn't\nensure hci_conn* is not concurrently modified/deleted. This locking\nappears to be leftover from before conn_hash started using RCU\ncommit bf4c63252490b (\"Bluetooth: convert conn hash to RCU\")\nand not clear if it had purpose since then.\n\nCurrently, there are code paths that delete hci_conn* from elsewhere\nthan the ordered hdev->workqueue where the RX work runs in. E.g.\ncommit 5af1f84ed13a (\"Bluetooth: hci_sync: Fix UAF on hci_abort_conn_sync\")\nintroduced some of these, and there probably were a few others before\nit. It's better to do the locking so that even if these run\nconcurrently no UAF is possible.\n\nMove the lookup of hci_conn and associated socket-specific conn to\nprotocol recv handlers, and do them within a single critical section\nto cover hci_conn* usage and lookup.\n\nsyzkaller has reported a crash that appears to be this issue:\n\n [Task hdev->workqueue] [Task 2]\n hci_disconnect_all_sync\n l2cap_recv_acldata(hcon)\n hci_conn_get(hcon)\n hci_abort_conn_sync(hcon)\n hci_dev_lock\n hci_dev_lock\n hci_conn_del(hcon)\n v-------------------------------- hci_dev_unlock\n hci_conn_put(hcon)\n conn = hcon->l2cap_data (UAF)"
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:A - The flaw is reached through Bluetooth ACL, SCO, or ISO packets, requiring an attacker within radio range of a connectable or advertising target.\nAC:L - An adjacent peer can repeatedly manipulate connection lifecycles while flooding receive traffic, influencing both sides of the race without an uncontrollable prerequisite.\nPR:N - The receive path performs no peer credential or kernel capability check and is reachable before application-level Bluetooth authentication.\nUI:N - No victim action is required once Bluetooth is operating in a connectable or advertising deployment; packet reception and teardown occur automatically.\nS:U - Exploitation compromises the host kernel within the same security authority and does not inherently cross a virtualization or hardware isolation boundary.\nC:H - The freed hci_conn and associated protocol objects contain numerous kernel pointers; reclaiming them can turn stale dereferences into powerful kernel-memory disclosure primitives.\nI:H - The UAF permits writes through reclaimed protocol state, including reference-count, workqueue, reassembly, and socket-related operations, making arbitrary corruption or control-flow hijacking plausible.\nA:H - The UAF has produced KASAN failures and kernel panics, and it can be triggered repeatedly to crash the system."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"include/net/bluetooth/hci_core.h",
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"net/bluetooth/hci_core.c",
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"net/bluetooth/iso.c",
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"net/bluetooth/l2cap_core.c",
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"net/bluetooth/sco.c"
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],
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"versions": [
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{
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"version": "5af1f84ed13a416297ab9ced7537f4d5ae7f329a",
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"lessThan": "ec74cdf77310c43b01b83ee898a9bd4b4b0b8e93",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5af1f84ed13a416297ab9ced7537f4d5ae7f329a",
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"lessThan": "79a2d4678ba90bdba577dc3af88cc900d6dcd5ee",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "cd55c13bbb3d093ae601aa97e588ed4c1390ebb1",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "4d3ca4a9aaf0aa798a6be372dc0fc3a29e37dd57",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "80265dd1d944c3f33e52375b5dbe654980bd2688",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6.1.149",
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"lessThan": "6.2",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.4.16",
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"lessThan": "6.5",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.5.3",
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"lessThan": "6.6",
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"status": "affected",
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"versionType": "semver"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"include/net/bluetooth/hci_core.h",
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"net/bluetooth/hci_core.c",
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"net/bluetooth/iso.c",
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"net/bluetooth/l2cap_core.c",
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"net/bluetooth/sco.c"
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],
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"versions": [
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{
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"version": "6.6",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.6",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.17.11",
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"lessThanOrEqual": "6.17.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.6",
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"versionEndExcluding": "6.17.11"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.6",
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"versionEndExcluding": "6.18"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.1.149"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.4.16"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.5.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/ec74cdf77310c43b01b83ee898a9bd4b4b0b8e93"
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},
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{
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"url": "https://git.kernel.org/stable/c/79a2d4678ba90bdba577dc3af88cc900d6dcd5ee"
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}
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],
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"title": "Bluetooth: hci_core: lookup hci_conn on RX path on protocol side",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2025-68304",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-15T22:00:49.566306Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-15T22:02:48.882Z"
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}
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}
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]
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}
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} |