264 lines
14 KiB
JSON
264 lines
14 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-2026-98456",
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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": "2026-09-25T10:25:14.350Z",
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"datePublished": "2026-10-18T15:15:05.909Z",
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"dateUpdated": "2026-10-30T12:38:14.270Z"
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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": "2026-10-30T12:38:14.270Z"
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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: mgmt: fix race in read_unconf_index_list()\n\nread_unconf_index_list() counts unconfigured controllers before allocating\nits response, then checks the device flags again while filling it.\n\nhci_dev_list_lock stabilizes list membership, but it does not serialize the\nper-device flags. During asynchronous controller setup, the worker can set\nHCI_UNCONFIGURED and clear HCI_SETUP between the two passes. A controller\nomitted from the allocation count can then become eligible for the fill\npass, causing an out-of-bounds write to rp->index[].\n\nAllocate space for every device on hci_dev_list. Since list membership\ncannot change while hci_dev_list_lock is held, the response remains large\nenough regardless of flag transitions. The reported count and response\nlength still include only eligible unconfigured controllers."
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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:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7,
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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:L - sendmsg() on a local PF_BLUETOOTH/BTPROTO_HCI socket bound to HCI_CHANNEL_CONTROL reaches hci_sock_sendmsg()->hci_mgmt_cmd()->read_unconf_index_list(). No over-the-air Bluetooth message supplies this management command or the corrupted data.\nAC:H - The overwrite requires the setup worker to set HCI_UNCONFIGURED and clear HCI_SETUP between read_unconf_index_list()'s sizing and filling walks. An untrusted management-socket caller cannot initiate or synchronize that controller-setup transition, so success depends on external timing.\nPR:L - mgmt_handlers[] marks MGMT_OP_READ_UNCONF_INDEX_LIST with HCI_MGMT_UNTRUSTED, and hci_sock_bind() permits HCI_CHANNEL_CONTROL binding without CAP_NET_ADMIN. Therefore any local user can issue the zero-length command.\nUI:N - The attacker can repeatedly send the management command without another user opening data or approving an operation; asynchronous controller setup is system state rather than required user interaction.\nS:U - The allocation and rp->index[] overwrite occur in read_unconf_index_list() within the host kernel heap, and no VM, IOMMU, or other security-authority boundary is crossed.\nC:H - When a newly eligible controller exceeds the allocation basis, rp->index[count++] writes 16-bit IDs past the kmalloc buffer and corrupts adjacent kernel heap storage; exploitable heap corruption can expose arbitrary kernel data.\nI:H - rp->index[count++] performs an out-of-bounds heap write for each newly eligible controller, allowing adjacent kernel objects to be modified and potentially enabling control-flow hijacking.\nA:H - The out-of-bounds writes can corrupt allocator or adjacent-object state and cause a kernel oops or panic, resulting in complete host availability loss."
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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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"net/bluetooth/mgmt.c"
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],
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"versions": [
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{
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"version": "73d1df2a7a1036a1f000e5f0ece6ade3e082b854",
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"lessThan": "fa6f79bb0009406bb11e6912b53ab7c564d6f06b",
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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": "73d1df2a7a1036a1f000e5f0ece6ade3e082b854",
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"lessThan": "76dc7e0297f6f7ebefc36a69251e3f4a676d9853",
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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": "73d1df2a7a1036a1f000e5f0ece6ade3e082b854",
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"lessThan": "9c32455f490b960efccedd041c7aabb1a04c5cc4",
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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": "73d1df2a7a1036a1f000e5f0ece6ade3e082b854",
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"lessThan": "524e0450dd9a396f99a81b045219b0e2ea0dab57",
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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": "73d1df2a7a1036a1f000e5f0ece6ade3e082b854",
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"lessThan": "8ddf962c76432a10a6cb80042875cbc48a9c056b",
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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": "73d1df2a7a1036a1f000e5f0ece6ade3e082b854",
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"lessThan": "416546cd6a54e9b68f2b91bc680b1ee17dcd77a1",
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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": "73d1df2a7a1036a1f000e5f0ece6ade3e082b854",
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"lessThan": "2e8bba0360d1379bfa8da47c8f5dadbb10a3fba1",
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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": "73d1df2a7a1036a1f000e5f0ece6ade3e082b854",
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"lessThan": "b5dbb41b212c50c095a4dbee3017a84fe94f033b",
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"status": "affected",
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"versionType": "git"
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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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"net/bluetooth/mgmt.c"
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],
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"versions": [
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{
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"version": "3.17",
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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": "3.17",
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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": "5.10.273",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.224",
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"lessThanOrEqual": "5.15.*",
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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": "6.1.191",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.158",
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"lessThanOrEqual": "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": "6.12.112",
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"lessThanOrEqual": "6.12.*",
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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": "6.18.55",
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"lessThanOrEqual": "6.18.*",
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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": "7.2.9",
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"lessThanOrEqual": "7.2.*",
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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": "7.3",
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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": "3.17",
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"versionEndExcluding": "5.10.273"
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/fa6f79bb0009406bb11e6912b53ab7c564d6f06b"
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},
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{
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"url": "https://git.kernel.org/stable/c/76dc7e0297f6f7ebefc36a69251e3f4a676d9853"
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},
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{
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"url": "https://git.kernel.org/stable/c/9c32455f490b960efccedd041c7aabb1a04c5cc4"
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},
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{
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"url": "https://git.kernel.org/stable/c/524e0450dd9a396f99a81b045219b0e2ea0dab57"
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},
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{
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"url": "https://git.kernel.org/stable/c/8ddf962c76432a10a6cb80042875cbc48a9c056b"
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},
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{
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"url": "https://git.kernel.org/stable/c/416546cd6a54e9b68f2b91bc680b1ee17dcd77a1"
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},
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{
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"url": "https://git.kernel.org/stable/c/2e8bba0360d1379bfa8da47c8f5dadbb10a3fba1"
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},
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{
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"url": "https://git.kernel.org/stable/c/b5dbb41b212c50c095a4dbee3017a84fe94f033b"
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}
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],
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"title": "Bluetooth: mgmt: fix race in read_unconf_index_list()",
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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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}
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} |