277 lines
14 KiB
JSON
277 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-2026-97975",
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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": "2026-09-25T10:18:58.207Z",
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"datePublished": "2026-09-25T10:23:13.971Z",
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"dateUpdated": "2026-10-21T12:53:55.330Z"
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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": "2026-10-21T12:53:55.330Z"
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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_sysfs: Fix NULL pointer dereference in device_del()\n\nA NULL pointer dereference in klist_put() occurs when a child device (such\nas a BNEP network device in bnep_session) is concurrently being\nunregistered while hci_conn_del_sysfs() reparents child devices.\n\nThis is caused by a race condition between hci_conn_del_sysfs() and\nconcurrent child device unregistration (e.g. bnep_session calling\nunregister_netdev()). During device unregistration, device_del() snapshots\na non-NULL parent pointer. Concurrently, hci_conn_del_sysfs() finds the\nchild device using device_find_any_child() and calls device_move() to\nreparent it to NULL, which removes the node from its parent's klist and\nclears knode_parent. Subsequently, device_del() calls\nklist_del(&dev->p->knode_parent) using the stale parent snapshot, causing\nklist_put() to dereference knode_klist(n)->put on an already removed node,\nresulting in a NULL pointer dereference.\n\nThis race was introduced by commit 27aabf27fd01 (\"Bluetooth: fix\nuse-after-free in device_for_each_child()\"), which replaced\ndevice_find_child(..., __match_tty) with device_find_any_child() in\nhci_conn_del_sysfs(). That change was intended to avoid a use-after-free\nwhere conn->dev outlived its parent hdev->dev when child devices held\nreferences to conn->dev, because conn->dev only held a reference to\nhdev->dev while registered in sysfs.\n\nFix the issue properly by taking an explicit reference to the parent device\nwith get_device(&hdev->dev) in hci_conn_init_sysfs() and dropping it with\nput_device(parent) in bt_link_release() when the conn device is freed. This\nensures that hdev->dev remains valid for the entire lifecycle of conn->dev,\nresolving the underlying use-after-free. With the parent reference held\nproperly, restore the __match_tty filter in hci_conn_del_sysfs() so that\ndevice_move() is only invoked on persistent RFCOMM TTY devices as\noriginally intended, eliminating the race condition with unregistering\nnetwork devices."
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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_sysfs.c"
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],
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"versions": [
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{
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"version": "de5a44f351ca7efd9add9851b218f5353e2224b7",
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"lessThan": "55b76500546e5f2e7fdd7ae7283530b620de6e61",
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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": "7b277bd569bb6a2777f0014f84b4344f444fd49d",
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"lessThan": "66cc55b69928b742d24b4c5b66d195ae96900e48",
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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": "27aabf27fd014ae037cc179c61b0bee7cff55b3d",
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"lessThan": "eeabdb25c3209569367e99a85ca9a503b64a646d",
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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": "27aabf27fd014ae037cc179c61b0bee7cff55b3d",
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"lessThan": "9e9ece97b8e716890793de261574b8efef7d8702",
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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": "27aabf27fd014ae037cc179c61b0bee7cff55b3d",
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"lessThan": "9b851b09b392da68bd715601f10a5adb2d8d19b8",
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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": "6894717a1ea363c5a27010ba604f957c309d282d",
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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": "fb91ce37dc9a37ea23cf32b6d7b667004e93d4c5",
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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": "a9584c897d1cba6265c78010bbb45ca5722c88bc",
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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": "0f67ca2a80acf8b207240405b7f72d660665d3df",
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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": "91e2a2e4d1336333804cd31162984f01ad8cc70f",
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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": "6.6.64",
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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": "6.12.2",
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"lessThan": "6.12.114",
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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": "5.4.297",
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"lessThan": "5.5",
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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": "5.10.231",
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"lessThan": "5.11",
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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": "5.15.174",
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"lessThan": "5.16",
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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": "6.1.120",
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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": "6.11.11",
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"lessThan": "6.12",
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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_sysfs.c"
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],
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"versions": [
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{
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"version": "6.13",
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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": "6.13",
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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": "6.18.53",
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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": "7.2.7",
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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": "6.6.64",
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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": "6.12.2",
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"versionEndExcluding": "6.12.114"
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},
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "6.18.53"
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"versionStartIncluding": "5.10.231"
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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": "6.11.11"
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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/55b76500546e5f2e7fdd7ae7283530b620de6e61"
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},
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{
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"url": "https://git.kernel.org/stable/c/66cc55b69928b742d24b4c5b66d195ae96900e48"
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},
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{
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"url": "https://git.kernel.org/stable/c/eeabdb25c3209569367e99a85ca9a503b64a646d"
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},
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{
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"url": "https://git.kernel.org/stable/c/9e9ece97b8e716890793de261574b8efef7d8702"
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},
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{
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"url": "https://git.kernel.org/stable/c/9b851b09b392da68bd715601f10a5adb2d8d19b8"
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}
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],
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"title": "Bluetooth: hci_sysfs: Fix NULL pointer dereference in device_del()",
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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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} |