{
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    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2024-36013",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix slab-use-after-free in l2cap_connect()\n\nExtend a critical section to prevent chan from early freeing.\nAlso make the l2cap_connect() return type void. Nothing is using the\nreturned value but it is ugly to return a potentially freed pointer.\nMaking it void will help with backports because earlier kernels did use\nthe return value. Now the compile will break for kernels where this\npatch is not a complete fix.\n\nCall stack summary:\n\n[use]\nl2cap_bredr_sig_cmd\n  l2cap_connect\n  \u250c mutex_lock(&conn->chan_lock);\n  \u2502 chan = pchan->ops->new_connection(pchan); <- alloc chan\n  \u2502 __l2cap_chan_add(conn, chan);\n  \u2502   l2cap_chan_hold(chan);\n  \u2502   list_add(&chan->list, &conn->chan_l);   ... (1)\n  \u2514 mutex_unlock(&conn->chan_lock);\n    chan->conf_state              ... (4) <- use after free\n\n[free]\nl2cap_conn_del\n\u250c mutex_lock(&conn->chan_lock);\n\u2502 foreach chan in conn->chan_l:            ... (2)\n\u2502   l2cap_chan_put(chan);\n\u2502     l2cap_chan_destroy\n\u2502       kfree(chan)               ... (3) <- chan freed\n\u2514 mutex_unlock(&conn->chan_lock);\n\n==================================================================\nBUG: KASAN: slab-use-after-free in instrument_atomic_read\ninclude/linux/instrumented.h:68 [inline]\nBUG: KASAN: slab-use-after-free in _test_bit\ninclude/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]\nBUG: KASAN: slab-use-after-free in l2cap_connect+0xa67/0x11a0\nnet/bluetooth/l2cap_core.c:4260\nRead of size 8 at addr ffff88810bf040a0 by task kworker/u3:1/311"
            }
        ]
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                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
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            "vendor_data": [
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                    "product": {
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                                "product_name": "Linux",
                                "version": {
                                    "version_data": [
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                                            "version_name": "73ffa904b782",
                                            "version_value": "cfe560c7050b"
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                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
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                                                        "version": "3.0",
                                                        "status": "affected"
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                                                        "lessThan": "3.0",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
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                                                        "version": "6.6.32",
                                                        "lessThanOrEqual": "6.6.*",
                                                        "status": "unaffected",
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                                                        "version": "6.8.11",
                                                        "lessThanOrEqual": "6.8.*",
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                                                        "version": "6.9",
                                                        "lessThanOrEqual": "*",
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                "url": "https://git.kernel.org/stable/c/cfe560c7050bfb37b0d2491bbe7cd8b59e77fdc5",
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                "name": "https://git.kernel.org/stable/c/826af9d2f69567c646ff46d10393d47e30ad23c6"
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                "url": "http://www.openwall.com/lists/oss-security/2024/05/30/2",
                "refsource": "MISC",
                "name": "http://www.openwall.com/lists/oss-security/2024/05/30/2"
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