268 lines
14 KiB
JSON
268 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-2026-46111",
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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": "2026-05-13T15:03:33.098Z",
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"datePublished": "2026-05-28T09:35:19.970Z",
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"dateUpdated": "2026-10-19T19:26:43.906Z"
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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": "2026-08-19T16:28:01.615Z"
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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_conn: fix potential UAF in create_big_sync\n\nAdd hci_conn_valid() check in create_big_sync() to detect stale\nconnections before proceeding with BIG creation. Handle the\nresulting -ECANCELED in create_big_complete() and re-validate the\nconnection under hci_dev_lock() before dereferencing, matching the\npattern used by create_le_conn_complete() and create_pa_complete().\n\nKeep the hci_conn object alive across the async boundary by taking\na reference via hci_conn_get() when queueing create_big_sync(), and\ndropping it in the completion callback. The refcount and the lock\nare complementary: the refcount keeps the object allocated, while\nhci_dev_lock() serializes hci_conn_hash_del()'s list_del_rcu() on\nhdev->conn_hash, as required by hci_conn_del().\n\nhci_conn_put() is called outside hci_dev_unlock() so the final put\n(which resolves to kfree() via bt_link_release) does not run under\nhdev->lock, though the release path would be safe either way.\n\nWithout this, create_big_complete() would unconditionally\ndereference the conn pointer on error, causing a use-after-free\nvia hci_connect_cfm() and hci_conn_del()."
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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 - The UAF is reached only through a local ISO socket connect() syscall (BTPROTO_ISO → iso_connect_bis → hci_connect_bis); BIG broadcast setup is locally initiated and requires no Bluetooth peer or over-the-air frame, so the attacker needs local system access.\nAC:L - This is a use-after-free where the attacker controls both sides of the race — initiating the async create_big work via connect() and freeing the conn (e.g., closing the socket) — and can retry at will, so the condition is within attacker control.\nPR:L - Creating and connecting an ISO socket requires no capability check (iso_sock_create/bt_sock_create perform none), so any unprivileged local user can reach the path on systems where the ISO/BIS feature is enabled.\nUI:N - The attacker performs all steps (open socket, connect, race a teardown); no victim interaction is required.\nS:U - The use-after-free is contained within the kernel's own memory/security authority and does not cross into another security boundary such as a VM or IOMMU domain.\nC:H - A UAF of the hci_conn object gives the attacker control over the freed object's contents, enabling kernel-memory disclosure (e.g., leaking pointers/data placed in the reclaimed allocation).\nI:H - The freed hci_conn is dereferenced and written via hci_connect_cfm() and hci_conn_del() (including list_del_rcu on conn_hash), so heap grooming of the freed slab yields an arbitrary-write/control-flow primitive.\nA:H - Dereferencing and deleting a freed hci_conn reliably causes memory corruption leading to a kernel oops/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_conn.c"
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],
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"versions": [
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{
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"version": "eca0ae4aea66914515e5e3098ea051b518ee5316",
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"lessThan": "d41093723e47255d7d74df86e2736711c1b8486e",
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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": "eca0ae4aea66914515e5e3098ea051b518ee5316",
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"lessThan": "6823f730bf195fc296d9edd09e2ca94bc1ff5584",
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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": "eca0ae4aea66914515e5e3098ea051b518ee5316",
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"lessThan": "1750a2df0eab61dc421a7afae74abdd239a44b85",
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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": "eca0ae4aea66914515e5e3098ea051b518ee5316",
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"lessThan": "dc34f8d8240f25dd137dc2758ebbcc75e3779142",
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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": "eca0ae4aea66914515e5e3098ea051b518ee5316",
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"lessThan": "f8eaf92c57ad99358dd372580d5ff87623343a72",
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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": "eca0ae4aea66914515e5e3098ea051b518ee5316",
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"lessThan": "0beddb0c380bed5f5b8e61ddbe14635bb73d0b41",
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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/hci_conn.c"
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],
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"versions": [
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{
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"version": "6.0",
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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": "6.0",
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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": "6.1.183",
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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": "6.6.140",
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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": "6.12.90",
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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": "6.18.32",
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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": "7.0.7",
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"lessThanOrEqual": "7.0.*",
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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": "7.1",
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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": "6.0",
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"versionEndExcluding": "6.1.183"
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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": "6.0",
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"versionEndExcluding": "6.6.140"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.0",
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"versionStartIncluding": "6.0",
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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/d41093723e47255d7d74df86e2736711c1b8486e"
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},
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{
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"url": "https://git.kernel.org/stable/c/6823f730bf195fc296d9edd09e2ca94bc1ff5584"
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},
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{
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"url": "https://git.kernel.org/stable/c/1750a2df0eab61dc421a7afae74abdd239a44b85"
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},
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{
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"url": "https://git.kernel.org/stable/c/dc34f8d8240f25dd137dc2758ebbcc75e3779142"
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},
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{
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"url": "https://git.kernel.org/stable/c/f8eaf92c57ad99358dd372580d5ff87623343a72"
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},
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{
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"url": "https://git.kernel.org/stable/c/0beddb0c380bed5f5b8e61ddbe14635bb73d0b41"
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}
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],
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"title": "Bluetooth: hci_conn: fix potential UAF in create_big_sync",
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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-2026-46111",
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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": "2026-10-16T15:19:42.422242Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-416",
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"description": "CWE-416 Use After Free"
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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": "2026-10-19T19:26:43.906Z"
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}
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}
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]
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}
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} |