CVE-2026-64434 (GCVE-0-2026-64434)
Vulnerability from cvelistv5 – Published: 2026-07-25 08:51 – Updated: 2026-07-27 05:00
VLAI
EPSS
VEX
Title
Bluetooth: L2CAP: Fix UAF in channel timeout by holding conn ref
Summary
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: L2CAP: Fix UAF in channel timeout by holding conn ref
l2cap_chan_timeout() runs asynchronously and accesses chan->conn. If
the connection is torn down while the timer is running or pending,
chan->conn can be freed, leading to a use-after-free when the timer
worker attempts to lock conn->lock:
| BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:112 [inline]
| BUG: KASAN: slab-use-after-free in atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:4456 [inline]
| BUG: KASAN: slab-use-after-free in __mutex_trylock_fast kernel/locking/mutex.c:161 [inline]
| BUG: KASAN: slab-use-after-free in mutex_lock+0x4f/0xa0 kernel/locking/mutex.c:318
| Write of size 8 at addr ffff8881298d9550 by task kworker/2:1/83
|
| CPU: 2 UID: 0 PID: 83 Comm: kworker/2:1 Not tainted 7.1.0-rc6-next-20260601-dirty #6 PREEMPT(full)
| Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-debian-1.17.0-1 04/01/2014
| Workqueue: events l2cap_chan_timeout
| Call Trace:
| <TASK>
| instrument_atomic_read_write include/linux/instrumented.h:112 [inline]
| atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:4456 [inline]
| __mutex_trylock_fast kernel/locking/mutex.c:161 [inline]
| mutex_lock+0x4f/0xa0 kernel/locking/mutex.c:318
| l2cap_chan_timeout+0x5d/0x1b0 net/bluetooth/l2cap_core.c:422
| process_one_work kernel/workqueue.c:3326 [inline]
| process_scheduled_works+0x7c8/0xfb0 kernel/workqueue.c:3409
| worker_thread+0x8a9/0xcf0 kernel/workqueue.c:3490
| kthread+0x346/0x430 kernel/kthread.c:436
| ret_from_fork+0x1a3/0x470 arch/x86/kernel/process.c:158
| ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
| </TASK>
|
| Allocated by task 320:
| l2cap_conn_add+0xa7/0x820 net/bluetooth/l2cap_core.c:7075
| l2cap_connect_cfm+0xdb/0xd70 net/bluetooth/l2cap_core.c:7452
| hci_connect_cfm include/net/bluetooth/hci_core.h:2139 [inline]
| hci_remote_features_evt+0x52f/0x9f0 net/bluetooth/hci_event.c:3760
| hci_event_func net/bluetooth/hci_event.c:7796 [inline]
| hci_event_packet+0x561/0xa70 net/bluetooth/hci_event.c:7847
| hci_rx_work+0x370/0x890 net/bluetooth/hci_core.c:4040
| process_one_work kernel/workqueue.c:3326 [inline]
| process_scheduled_works+0x7c8/0xfb0 kernel/workqueue.c:3409
| worker_thread+0x8a9/0xcf0 kernel/workqueue.c:3490
| kthread+0x346/0x430 kernel/kthread.c:436
| ret_from_fork+0x1a3/0x470 arch/x86/kernel/process.c:158
| ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
|
| Freed by task 322:
| hci_disconn_cfm include/net/bluetooth/hci_core.h:2154 [inline]
| hci_conn_hash_flush+0x101/0x1f0 net/bluetooth/hci_conn.c:2736
| hci_dev_close_sync+0x889/0xde0 net/bluetooth/hci_sync.c:5405
| hci_dev_do_close net/bluetooth/hci_core.c:502 [inline]
| hci_unregister_dev+0x1f7/0x370 net/bluetooth/hci_core.c:2679
| vhci_release+0x12a/0x180 drivers/bluetooth/hci_vhci.c:690
| __fput+0x369/0x890 fs/file_table.c:510
| task_work_run+0x160/0x1d0 kernel/task_work.c:233
| get_signal+0xf5b/0x1120 kernel/signal.c:2810
| arch_do_signal_or_restart+0x4d/0x600 arch/x86/kernel/signal.c:337
| __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
| exit_to_user_mode_loop+0x85/0x510 kernel/entry/common.c:98
| do_syscall_64+0x263/0x3d0 arch/x86/entry/syscall_64.c:100
| entry_SYSCALL_64_after_hwframe+0x77/0x7f
|
| The buggy address belongs to the object at ffff8881298d9400
| which belongs to the cache kmalloc-512 of size 512
| The buggy address is located 336 bytes inside of
| freed 512-byte region [ffff8881298d9400, ffff8881298d9600)
Fix it by having chan->conn hold a reference to l2cap_conn (via
l2cap_conn_get) when the channel is added to the connection, and
releasing it in the channel destructor. This ensures the l2cap_conn
remains alive as long as the channel exists.
A new FLAG_DEL channel flag is introduced to indicate that the ch
---truncated---
Severity
8.8 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
89dec92041717b027216e110599e4f6d6c921b79 , < 91047a4396a8b1857a6f712a90cf33ec0012b189
(git)
Affected: 50dfec218808b148ab4247b1858031b7a32015c5 , < 0b0e2bf39cf99e458d991b9df253727e036a7d7d (git) Affected: 859d3ace791ed878ae9ba5522c7844d960da8f88 , < d3b739db5dc6f688a60d56da872fabaf65246032 (git) Affected: 8c8e620467a7b51562dbcefbd1f09f288d7d710d , < 50c38d9f42a529691e4e67ea9cedf4f0bfc8d277 (git) Affected: 8c8e620467a7b51562dbcefbd1f09f288d7d710d , < b66774b48dd98f07254951f74ea6f513efe7ff8b (git) Affected: 3634cbdc2eb414b69ffa752ddbe5e0458518e321 (git) Affected: e1c100e2d61bd8c718b7d91fe3e050780a9bf72d (git) Affected: deb8493a8fa599f6c95e2465b12bfdfb7f94a1d9 (git) Affected: 7555fd885a0603f50e49a655850a1f2bd8a25398 (git) Affected: 6.6.143 , < 6.6.145 (semver) Affected: 6.12.93 , < 6.12.97 (semver) Affected: 6.18.35 , < 6.18.39 (semver) Affected: 5.10.259 , < 5.11 (semver) Affected: 5.15.210 , < 5.16 (semver) Affected: 6.1.176 , < 6.2 (semver) Affected: 7.0.12 , < 7.1 (semver) |
|
| Linux | Linux |
Affected:
7.1
Unaffected: 0 , < 7.1 (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
{
"containers": {
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"programFiles": [
"include/net/bluetooth/l2cap.h",
"net/bluetooth/l2cap_core.c"
],
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]
},
{
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"product": "Linux",
"programFiles": [
"include/net/bluetooth/l2cap.h",
"net/bluetooth/l2cap_core.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
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},
{
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{
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{
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"version": "7.1.4",
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},
{
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"status": "unaffected",
"version": "7.2-rc1",
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}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
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"vulnerable": true
},
{
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},
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{
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix UAF in channel timeout by holding conn ref\n\nl2cap_chan_timeout() runs asynchronously and accesses chan-\u003econn. If\nthe connection is torn down while the timer is running or pending,\nchan-\u003econn can be freed, leading to a use-after-free when the timer\nworker attempts to lock conn-\u003elock:\n\n| BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:112 [inline]\n| BUG: KASAN: slab-use-after-free in atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:4456 [inline]\n| BUG: KASAN: slab-use-after-free in __mutex_trylock_fast kernel/locking/mutex.c:161 [inline]\n| BUG: KASAN: slab-use-after-free in mutex_lock+0x4f/0xa0 kernel/locking/mutex.c:318\n| Write of size 8 at addr ffff8881298d9550 by task kworker/2:1/83\n|\n| CPU: 2 UID: 0 PID: 83 Comm: kworker/2:1 Not tainted 7.1.0-rc6-next-20260601-dirty #6 PREEMPT(full)\n| Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-debian-1.17.0-1 04/01/2014\n| Workqueue: events l2cap_chan_timeout\n| Call Trace:\n| \u003cTASK\u003e\n| instrument_atomic_read_write include/linux/instrumented.h:112 [inline]\n| atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:4456 [inline]\n| __mutex_trylock_fast kernel/locking/mutex.c:161 [inline]\n| mutex_lock+0x4f/0xa0 kernel/locking/mutex.c:318\n| l2cap_chan_timeout+0x5d/0x1b0 net/bluetooth/l2cap_core.c:422\n| process_one_work kernel/workqueue.c:3326 [inline]\n| process_scheduled_works+0x7c8/0xfb0 kernel/workqueue.c:3409\n| worker_thread+0x8a9/0xcf0 kernel/workqueue.c:3490\n| kthread+0x346/0x430 kernel/kthread.c:436\n| ret_from_fork+0x1a3/0x470 arch/x86/kernel/process.c:158\n| ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245\n| \u003c/TASK\u003e\n|\n| Allocated by task 320:\n| l2cap_conn_add+0xa7/0x820 net/bluetooth/l2cap_core.c:7075\n| l2cap_connect_cfm+0xdb/0xd70 net/bluetooth/l2cap_core.c:7452\n| hci_connect_cfm include/net/bluetooth/hci_core.h:2139 [inline]\n| hci_remote_features_evt+0x52f/0x9f0 net/bluetooth/hci_event.c:3760\n| hci_event_func net/bluetooth/hci_event.c:7796 [inline]\n| hci_event_packet+0x561/0xa70 net/bluetooth/hci_event.c:7847\n| hci_rx_work+0x370/0x890 net/bluetooth/hci_core.c:4040\n| process_one_work kernel/workqueue.c:3326 [inline]\n| process_scheduled_works+0x7c8/0xfb0 kernel/workqueue.c:3409\n| worker_thread+0x8a9/0xcf0 kernel/workqueue.c:3490\n| kthread+0x346/0x430 kernel/kthread.c:436\n| ret_from_fork+0x1a3/0x470 arch/x86/kernel/process.c:158\n| ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245\n|\n| Freed by task 322:\n| hci_disconn_cfm include/net/bluetooth/hci_core.h:2154 [inline]\n| hci_conn_hash_flush+0x101/0x1f0 net/bluetooth/hci_conn.c:2736\n| hci_dev_close_sync+0x889/0xde0 net/bluetooth/hci_sync.c:5405\n| hci_dev_do_close net/bluetooth/hci_core.c:502 [inline]\n| hci_unregister_dev+0x1f7/0x370 net/bluetooth/hci_core.c:2679\n| vhci_release+0x12a/0x180 drivers/bluetooth/hci_vhci.c:690\n| __fput+0x369/0x890 fs/file_table.c:510\n| task_work_run+0x160/0x1d0 kernel/task_work.c:233\n| get_signal+0xf5b/0x1120 kernel/signal.c:2810\n| arch_do_signal_or_restart+0x4d/0x600 arch/x86/kernel/signal.c:337\n| __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]\n| exit_to_user_mode_loop+0x85/0x510 kernel/entry/common.c:98\n| do_syscall_64+0x263/0x3d0 arch/x86/entry/syscall_64.c:100\n| entry_SYSCALL_64_after_hwframe+0x77/0x7f\n|\n| The buggy address belongs to the object at ffff8881298d9400\n| which belongs to the cache kmalloc-512 of size 512\n| The buggy address is located 336 bytes inside of\n| freed 512-byte region [ffff8881298d9400, ffff8881298d9600)\n\nFix it by having chan-\u003econn hold a reference to l2cap_conn (via\nl2cap_conn_get) when the channel is added to the connection, and\nreleasing it in the channel destructor. This ensures the l2cap_conn\nremains alive as long as the channel exists.\n\nA new FLAG_DEL channel flag is introduced to indicate that the ch\n---truncated---"
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 8.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-27T05:00:54.711Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/91047a4396a8b1857a6f712a90cf33ec0012b189"
},
{
"url": "https://git.kernel.org/stable/c/0b0e2bf39cf99e458d991b9df253727e036a7d7d"
},
{
"url": "https://git.kernel.org/stable/c/d3b739db5dc6f688a60d56da872fabaf65246032"
},
{
"url": "https://git.kernel.org/stable/c/50c38d9f42a529691e4e67ea9cedf4f0bfc8d277"
},
{
"url": "https://git.kernel.org/stable/c/b66774b48dd98f07254951f74ea6f513efe7ff8b"
}
],
"title": "Bluetooth: L2CAP: Fix UAF in channel timeout by holding conn ref",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-64434",
"datePublished": "2026-07-25T08:51:09.066Z",
"dateReserved": "2026-07-19T15:36:31.787Z",
"dateUpdated": "2026-07-27T05:00:54.711Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-64434",
"date": "2026-07-26",
"epss": "0.00168",
"percentile": "0.06417"
},
"microsoft_vex": {
"current_release_date": "2026-07-26T01:09:32.000Z",
"cve": "CVE-2026-64434",
"id": "msrc_CVE-2026-64434",
"initial_release_date": "2026-07-26T01:09:32.000Z",
"product_status:under_investigation": "1",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "Bluetooth: L2CAP: Fix UAF in channel timeout by holding conn ref",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-64434.json",
"version": "1"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-64434\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-25T10:17:27.717\",\"lastModified\":\"2026-07-27T05:16:49.667\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nBluetooth: L2CAP: Fix UAF in channel timeout by holding conn ref\\n\\nl2cap_chan_timeout() runs asynchronously and accesses chan-\u003econn. If\\nthe connection is torn down while the timer is running or pending,\\nchan-\u003econn can be freed, leading to a use-after-free when the timer\\nworker attempts to lock conn-\u003elock:\\n\\n| BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:112 [inline]\\n| BUG: KASAN: slab-use-after-free in atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:4456 [inline]\\n| BUG: KASAN: slab-use-after-free in __mutex_trylock_fast kernel/locking/mutex.c:161 [inline]\\n| BUG: KASAN: slab-use-after-free in mutex_lock+0x4f/0xa0 kernel/locking/mutex.c:318\\n| Write of size 8 at addr ffff8881298d9550 by task kworker/2:1/83\\n|\\n| CPU: 2 UID: 0 PID: 83 Comm: kworker/2:1 Not tainted 7.1.0-rc6-next-20260601-dirty #6 PREEMPT(full)\\n| Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-debian-1.17.0-1 04/01/2014\\n| Workqueue: events l2cap_chan_timeout\\n| Call Trace:\\n| \u003cTASK\u003e\\n| instrument_atomic_read_write include/linux/instrumented.h:112 [inline]\\n| atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:4456 [inline]\\n| __mutex_trylock_fast kernel/locking/mutex.c:161 [inline]\\n| mutex_lock+0x4f/0xa0 kernel/locking/mutex.c:318\\n| l2cap_chan_timeout+0x5d/0x1b0 net/bluetooth/l2cap_core.c:422\\n| process_one_work kernel/workqueue.c:3326 [inline]\\n| process_scheduled_works+0x7c8/0xfb0 kernel/workqueue.c:3409\\n| worker_thread+0x8a9/0xcf0 kernel/workqueue.c:3490\\n| kthread+0x346/0x430 kernel/kthread.c:436\\n| ret_from_fork+0x1a3/0x470 arch/x86/kernel/process.c:158\\n| ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245\\n| \u003c/TASK\u003e\\n|\\n| Allocated by task 320:\\n| l2cap_conn_add+0xa7/0x820 net/bluetooth/l2cap_core.c:7075\\n| l2cap_connect_cfm+0xdb/0xd70 net/bluetooth/l2cap_core.c:7452\\n| hci_connect_cfm include/net/bluetooth/hci_core.h:2139 [inline]\\n| hci_remote_features_evt+0x52f/0x9f0 net/bluetooth/hci_event.c:3760\\n| hci_event_func net/bluetooth/hci_event.c:7796 [inline]\\n| hci_event_packet+0x561/0xa70 net/bluetooth/hci_event.c:7847\\n| hci_rx_work+0x370/0x890 net/bluetooth/hci_core.c:4040\\n| process_one_work kernel/workqueue.c:3326 [inline]\\n| process_scheduled_works+0x7c8/0xfb0 kernel/workqueue.c:3409\\n| worker_thread+0x8a9/0xcf0 kernel/workqueue.c:3490\\n| kthread+0x346/0x430 kernel/kthread.c:436\\n| ret_from_fork+0x1a3/0x470 arch/x86/kernel/process.c:158\\n| ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245\\n|\\n| Freed by task 322:\\n| hci_disconn_cfm include/net/bluetooth/hci_core.h:2154 [inline]\\n| hci_conn_hash_flush+0x101/0x1f0 net/bluetooth/hci_conn.c:2736\\n| hci_dev_close_sync+0x889/0xde0 net/bluetooth/hci_sync.c:5405\\n| hci_dev_do_close net/bluetooth/hci_core.c:502 [inline]\\n| hci_unregister_dev+0x1f7/0x370 net/bluetooth/hci_core.c:2679\\n| vhci_release+0x12a/0x180 drivers/bluetooth/hci_vhci.c:690\\n| __fput+0x369/0x890 fs/file_table.c:510\\n| task_work_run+0x160/0x1d0 kernel/task_work.c:233\\n| get_signal+0xf5b/0x1120 kernel/signal.c:2810\\n| arch_do_signal_or_restart+0x4d/0x600 arch/x86/kernel/signal.c:337\\n| __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]\\n| exit_to_user_mode_loop+0x85/0x510 kernel/entry/common.c:98\\n| do_syscall_64+0x263/0x3d0 arch/x86/entry/syscall_64.c:100\\n| entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n|\\n| The buggy address belongs to the object at ffff8881298d9400\\n| which belongs to the cache kmalloc-512 of size 512\\n| The buggy address is located 336 bytes inside of\\n| freed 512-byte region [ffff8881298d9400, ffff8881298d9600)\\n\\nFix it by having chan-\u003econn hold a reference to l2cap_conn (via\\nl2cap_conn_get) when the channel is added to the connection, and\\nreleasing it in the channel destructor. This ensures the l2cap_conn\\nremains alive as long as the channel exists.\\n\\nA new FLAG_DEL channel flag is introduced to indicate that the ch\\n---truncated---\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"include/net/bluetooth/l2cap.h\",\"net/bluetooth/l2cap_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"89dec92041717b027216e110599e4f6d6c921b79\",\"lessThan\":\"91047a4396a8b1857a6f712a90cf33ec0012b189\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"50dfec218808b148ab4247b1858031b7a32015c5\",\"lessThan\":\"0b0e2bf39cf99e458d991b9df253727e036a7d7d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"859d3ace791ed878ae9ba5522c7844d960da8f88\",\"lessThan\":\"d3b739db5dc6f688a60d56da872fabaf65246032\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8c8e620467a7b51562dbcefbd1f09f288d7d710d\",\"lessThan\":\"50c38d9f42a529691e4e67ea9cedf4f0bfc8d277\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8c8e620467a7b51562dbcefbd1f09f288d7d710d\",\"lessThan\":\"b66774b48dd98f07254951f74ea6f513efe7ff8b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3634cbdc2eb414b69ffa752ddbe5e0458518e321\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e1c100e2d61bd8c718b7d91fe3e050780a9bf72d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"deb8493a8fa599f6c95e2465b12bfdfb7f94a1d9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7555fd885a0603f50e49a655850a1f2bd8a25398\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6.6.143\",\"lessThan\":\"6.6.145\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.12.93\",\"lessThan\":\"6.12.97\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.18.35\",\"lessThan\":\"6.18.39\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.10.259\",\"lessThan\":\"5.11\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.15.210\",\"lessThan\":\"5.16\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.1.176\",\"lessThan\":\"6.2\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"7.0.12\",\"lessThan\":\"7.1\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"include/net/bluetooth/l2cap.h\",\"net/bluetooth/l2cap_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"7.1\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"7.1\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.97\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.39\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.4\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0b0e2bf39cf99e458d991b9df253727e036a7d7d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/50c38d9f42a529691e4e67ea9cedf4f0bfc8d277\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/91047a4396a8b1857a6f712a90cf33ec0012b189\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b66774b48dd98f07254951f74ea6f513efe7ff8b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d3b739db5dc6f688a60d56da872fabaf65246032\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
"suse_vex": {
"aggregate_severity": "not set",
"current_release_date": "2026-07-25T15:59:25Z",
"cve": "CVE-2026-64434",
"id": "CVE-2026-64434",
"initial_release_date": "2026-07-25T15:59:25Z",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-64434",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64434.json",
"version": "2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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