Answer in brief
CVE-2024-36968 records a High severity (CVSS 7.6) vulnerability in Bluetooth: L2CAP: Fix div-by-zero in l2cap_le_flowctl_init(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=6ed58ec520ad2b2fe3f955c8a5fd0eecafccebdf <ad3f7986c5a0f82b8b66a0afe1cc1f5421e1d674 || >=6ed58ec520ad2b2fe3f955c8a5fd0eecafccebdf <dfece2b4e3759759b2bdfac2cd6d0ee9fbf055f3 || >=6ed58ec520ad2b2fe3f955c8a5fd0eecafccebdf <d2b2f7d3936dc5990549bc36ab7ac7ac37f22c30 || >=6ed58ec520ad2b2fe3f955c8a5fd0eecafccebdf <4d3dbaa252257d20611c3647290e6171f1bbd6c8 || >=6ed58ec520ad2b2fe3f955c8a5fd0eecafccebdf <a5b862c6a221459d54e494e88965b48dcfa6cc44 | ad3f7986c5a0f82b8b66a0afe1cc1f5421e1d674, dfece2b4e3759759b2bdfac2cd6d0ee9fbf055f3, d2b2f7d3936dc5990549bc36ab7ac7ac37f22c30, 4d3dbaa252257d20611c3647290e6171f1bbd6c8, a5b862c6a221459d54e494e88965b48dcfa6cc44 |
| Linux/Linuxgeneric | 2.6.39 | Not reported |
| Linux/Linuxgeneric | >=6ed58ec520ad2b2fe3f955c8a5fd0eecafccebdf <e34634fad3792d4d35850cae72b7b7813466844f || >=6ed58ec520ad2b2fe3f955c8a5fd0eecafccebdf <ad3f7986c5a0f82b8b66a0afe1cc1f5421e1d674 || >=6ed58ec520ad2b2fe3f955c8a5fd0eecafccebdf <dfece2b4e3759759b2bdfac2cd6d0ee9fbf055f3 || >=6ed58ec520ad2b2fe3f955c8a5fd0eecafccebdf <d2b2f7d3936dc5990549bc36ab7ac7ac37f22c30 || >=6ed58ec520ad2b2fe3f955c8a5fd0eecafccebdf <4d3dbaa252257d20611c3647290e6171f1bbd6c8 || >=6ed58ec520ad2b2fe3f955c8a5fd0eecafccebdf <a5b862c6a221459d54e494e88965b48dcfa6cc44 | e34634fad3792d4d35850cae72b7b7813466844f, ad3f7986c5a0f82b8b66a0afe1cc1f5421e1d674, dfece2b4e3759759b2bdfac2cd6d0ee9fbf055f3, d2b2f7d3936dc5990549bc36ab7ac7ac37f22c30, 4d3dbaa252257d20611c3647290e6171f1bbd6c8, a5b862c6a221459d54e494e88965b48dcfa6cc44 |
Published upstream
Jun 8, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix div-by-zero in l2cap_le_flowctl_init() l2cap_le_flowctl_init() can cause both div-by-zero and an integer overflow since hdev->le_mtu may not fall in the valid range. Move MTU from hci_dev to hci_conn to validate MTU and stop the connection process earlier if MTU is invalid. Also, add a missing validation in read_buffer_size() and make it return an error value if the validation fails. Now hci_conn_add() returns ERR_PTR() as it can fail due to the both a kzalloc failure and invalid MTU value. divide error: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 PID: 67 Comm: kworker/u5:0 Tainted: G W 6.9.0-rc5+ #20 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Workqueue: hci0 hci_rx_work RIP: 0010:l2cap_le_flowctl_init+0x19e/0x3f0 net/bluetooth/l2cap_core.c:547 Code: e8 17 17 0c 00 66 41 89 9f 84 00 00 00 bf 01 00 00 00 41 b8 02 00 00 00 4c 89 fe 4c 89 e2 89 d9 e8 27 17 0c 00 44 89 f0 31 d2 <66> f7 f3 89 c3 ff c3 4d 8d b7 88 00 00 00 4c 89 f0 48 c1 e8 03 42 RSP: 0018:ffff88810bc0f858 EFLAGS: 00010246 RAX: 00000000000002a0 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: ffff88810bc0f7c0 RDI: ffffc90002dcb66f RBP: ffff88810bc0f880 R08: aa69db2dda70ff01 R09: 0000ffaaaaaaaaaa R10: 0084000000ffaaaa R11: 0000000000000000 R12: ffff88810d65a084 R13: dffffc0000000000 R14: 00000000000002a0 R15: ffff88810d65a000 FS: 0000000000000000(0000) GS:ffff88811ac00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000100 CR3: 0000000103268003 CR4: 0000000000770ef0 PKRU: 55555554 Call Trace: <TASK> l2cap_le_connect_req net/bluetooth/l2cap_core.c:4902 [inline] l2cap_le_sig_cmd net/bluetooth/l2cap_core.c:5420 [inline] l2cap_le_sig_channel net/bluetooth/l2cap_core.c:5486 [inline] l2cap_recv_frame+0xe59d/0x11710 net/bluetooth/l2cap_core.c:6809 l2cap_recv_acldata+0x544/0x10a0 net/bluetooth/l2cap_core.c:7506 hci_acldata_packet net/bluetooth/hci_core.c:3939 [inline] hci_rx_work+0x5e5/0xb20 net/bluetooth/hci_core.c:4176 process_one_work kernel/workqueue.c:3254 [inline] process_scheduled_works+0x90f/0x1530 kernel/workqueue.c:3335 worker_thread+0x926/0xe70 kernel/workqueue.c:3416 kthread+0x2e3/0x380 kernel/kthread.c:388 ret_from_fork+0x5c/0x90 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]---
Quoted source text, attributed separately from HOL analysis.