225 lines
13 KiB
JSON
225 lines
13 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-2026-99014",
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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": "2026-09-25T10:25:14.385Z",
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"datePublished": "2026-10-23T12:20:39.617Z",
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"dateUpdated": "2026-10-24T14:10:02.640Z"
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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": "2026-10-24T14:10:02.640Z"
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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_sync: Fix command skb lifetime during scan setup\n\nDuring PA sync scan setup, hci_le_set_ext_scan_param_sync() gets the\naddress used for the PA_LINK lookup from hci_sent_cmd_data(). The\nreturned pointer borrows storage from sent_cmd or req_skb, without\nholding a reference to either skb.\n\nThe scan worker runs on req_workqueue while hci_cmd_work() runs on the\nseparate device workqueue. After the scan worker loads sent_cmd, the\ncommand worker can free and replace it before hci_sent_cmd_data()\ndereferences the skb. The command payload can also be freed between\nreturning from the helper and comparing the address. The connection\nlookup's RCU critical section does not protect the command skb.\n\nKASAN reported:\n\n BUG: KASAN: slab-use-after-free in hci_sent_cmd_data+0x27c/0x2f0\n Workqueue: hci0 hci_cmd_sync_work\n Call Trace:\n hci_sent_cmd_data+0x27c/0x2f0\n hci_le_set_scan_param_sync+0x43a/0x850\n hci_passive_scan_sync+0xb09/0x1460\n hci_update_passive_scan_sync+0x47c/0x6e0\n hci_le_pa_create_sync+0x200/0xa70\n hci_cmd_sync_work+0x13c/0x290\n\n Allocated by task 95:\n skb_clone+0x13f/0x340\n hci_cmd_work+0x2a9/0x7e0\n\n Freed by task 95:\n kmem_cache_free+0xba/0x3a0\n hci_cmd_work+0x29c/0x7e0\n\nUse hdev->lock to serialize the address snapshot with sent_cmd\nreplacement. Protect req_skb replacement and completion cleanup with\nthe same lock because the helper falls back to that skb. Copy the\naddress before releasing the lock and use the copy for the existing\nRCU-protected connection lookup. Release the mutex before sending or\nwaiting for commands, preserving the lookup and completion ordering."
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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:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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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:L - A local listen(2) on a broadcast BTPROTO_ISO socket reaches iso_sock_listen() → iso_listen_bis() → hci_pa_create_sync() → hci_le_pa_create_sync() → hci_le_set_ext_scan_param_sync(). No received Bluetooth PDU initiates this PA-sync setup.\nAC:L - The attacker can run the ISO listen while flooding security-filter-permitted HCI_OP_READ_LOCAL_VERSION commands through a raw HCI socket; hci_sock_sendmsg() queues them on hdev->cmd_q, making hci_cmd_work() race hci_sent_cmd_data() on the separate req_workqueue.\nPR:L - iso_sock_create(), bind(), and listen() have no capability check, while an unprivileged raw HCI socket may submit HCI_OP_READ_LOCAL_VERSION because OGF_INFO_PARAM/OCF 1 is in hci_sec_filter. Bluetooth sockets require init_net, but an ordinary host user satisfies that condition.\nUI:N - The attacking process itself binds and listens on the broadcast ISO socket and submits the racing raw HCI commands; no separate victim action is needed once ISO sockets and the adapter are enabled.\nS:U - The stale sent_cmd or req_skb and resulting memory access remain within the host kernel's Bluetooth authority; hci_le_set_ext_scan_param_sync() crosses no VM, IOMMU, or other security boundary.\nC:H - hci_cmd_data() dereferences len and data from a freed sk_buff, and the returned command-payload pointer can itself be freed before the six-byte bdaddr read. Reclaiming the sprayable skbuff_head_cache object therefore supplies an attacker-directed stale-pointer read primitive.\nI:H - A reclaimed command sk_buff controls the stale len/data fields and the bdaddr used to select a PA_LINK, whose iso_qos then determines the HCI_OP_LE_SET_EXT_SCAN_PARAMS command. This sprayable kernel use-after-free is an integrity-high memory-corruption primitive.\nA:H - KASAN confirmed a slab-use-after-free in hci_sent_cmd_data(); dereferencing the freed sk_buff or its released payload can fault in hci_cmd_sync_work and cause a kernel oops or panic."
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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/hci_core.c",
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"net/bluetooth/hci_sync.c"
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],
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"versions": [
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{
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"version": "de3c85d321bfb85b7742a6cfab95d680da3e26b1",
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"lessThan": "f01cbddfb4273fcc9a786d13b0a2525029023605",
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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": "22cbf4f84c00da64196eb15034feee868e63eef0",
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"lessThan": "119ba8070b3f112dd36c897f4f70ea5bb7d370b8",
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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": "22cbf4f84c00da64196eb15034feee868e63eef0",
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"lessThan": "7db33b36213a3a1a40940c009ddac30670b55922",
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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": "22cbf4f84c00da64196eb15034feee868e63eef0",
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"lessThan": "762850c203fab1190ad6a3de41cd51920b22236d",
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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": "22cbf4f84c00da64196eb15034feee868e63eef0",
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"lessThan": "9af12272061d206af8bc3e40215cb694421ab73a",
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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": "7a54f8314584f78fb0557153b1059924249ef628",
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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": "6.6.28",
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"lessThan": "6.6.160",
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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": "6.8.7",
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"lessThan": "6.9",
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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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"net/bluetooth/hci_core.c",
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"net/bluetooth/hci_sync.c"
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],
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"versions": [
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{
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"version": "6.9",
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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": "6.9",
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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": "6.6.160",
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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": "6.12.114",
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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": "6.18.57",
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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": "7.2.11",
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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": "6.6.28",
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"versionEndExcluding": "6.6.160"
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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": "6.9",
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"versionEndExcluding": "6.12.114"
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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": "6.9",
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"versionEndExcluding": "6.18.57"
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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": "6.9",
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"versionEndExcluding": "7.2.11"
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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": "6.9",
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"versionEndExcluding": "7.3"
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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": "6.8.7"
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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/f01cbddfb4273fcc9a786d13b0a2525029023605"
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},
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{
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"url": "https://git.kernel.org/stable/c/119ba8070b3f112dd36c897f4f70ea5bb7d370b8"
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},
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{
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"url": "https://git.kernel.org/stable/c/7db33b36213a3a1a40940c009ddac30670b55922"
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},
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{
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"url": "https://git.kernel.org/stable/c/762850c203fab1190ad6a3de41cd51920b22236d"
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},
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{
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"url": "https://git.kernel.org/stable/c/9af12272061d206af8bc3e40215cb694421ab73a"
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}
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],
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"title": "Bluetooth: hci_sync: Fix command skb lifetime during scan setup",
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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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} |