cve-2024-36013
Vulnerability from cvelistv5
Published
2024-05-23 07:03
Modified
2024-11-05 09:26
Severity ?
EPSS score ?
Summary
Bluetooth: L2CAP: Fix slab-use-after-free in l2cap_connect()
References
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"id": "CVE-2024-36013",
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"timestamp": "2024-05-23T16:10:59.613631Z",
"version": "2.0.3"
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"version": "6.8.11",
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"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(\u0026conn-\u003echan_lock);\n \u2502 chan = pchan-\u003eops-\u003enew_connection(pchan); \u003c- alloc chan\n \u2502 __l2cap_chan_add(conn, chan);\n \u2502 l2cap_chan_hold(chan);\n \u2502 list_add(\u0026chan-\u003elist, \u0026conn-\u003echan_l); ... (1)\n \u2514 mutex_unlock(\u0026conn-\u003echan_lock);\n chan-\u003econf_state ... (4) \u003c- use after free\n\n[free]\nl2cap_conn_del\n\u250c mutex_lock(\u0026conn-\u003echan_lock);\n\u2502 foreach chan in conn-\u003echan_l: ... (2)\n\u2502 l2cap_chan_put(chan);\n\u2502 l2cap_chan_destroy\n\u2502 kfree(chan) ... (3) \u003c- chan freed\n\u2514 mutex_unlock(\u0026conn-\u003echan_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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"dateUpdated": "2024-11-05T09:26:46.959Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"url": "https://git.kernel.org/stable/c/cfe560c7050bfb37b0d2491bbe7cd8b59e77fdc5"
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"url": "https://git.kernel.org/stable/c/826af9d2f69567c646ff46d10393d47e30ad23c6"
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"url": "https://git.kernel.org/stable/c/4d7b41c0e43995b0e992b9f8903109275744b658"
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"title": "Bluetooth: L2CAP: Fix slab-use-after-free in l2cap_connect()",
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"assignerShortName": "Linux",
"cveId": "CVE-2024-36013",
"datePublished": "2024-05-23T07:03:07.571Z",
"dateReserved": "2024-05-17T13:50:33.153Z",
"dateUpdated": "2024-11-05T09:26:46.959Z",
"state": "PUBLISHED"
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"meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2024-36013\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-23T07:15:08.987\",\"lastModified\":\"2024-11-05T10:17:04.233\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"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(\u0026conn-\u003echan_lock);\\n \u2502 chan = pchan-\u003eops-\u003enew_connection(pchan); \u003c- alloc chan\\n \u2502 __l2cap_chan_add(conn, chan);\\n \u2502 l2cap_chan_hold(chan);\\n \u2502 list_add(\u0026chan-\u003elist, \u0026conn-\u003echan_l); ... (1)\\n \u2514 mutex_unlock(\u0026conn-\u003echan_lock);\\n chan-\u003econf_state ... (4) \u003c- use after free\\n\\n[free]\\nl2cap_conn_del\\n\u250c mutex_lock(\u0026conn-\u003echan_lock);\\n\u2502 foreach chan in conn-\u003echan_l: ... (2)\\n\u2502 l2cap_chan_put(chan);\\n\u2502 l2cap_chan_destroy\\n\u2502 kfree(chan) ... (3) \u003c- chan freed\\n\u2514 mutex_unlock(\u0026conn-\u003echan_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\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: Bluetooth: L2CAP: corrige slab-use-after-free en l2cap_connect() Amplia una secci\u00f3n cr\u00edtica para evitar que chan se libere anticipadamente. Tambi\u00e9n anule el tipo de retorno l2cap_connect(). Nada utiliza el valor devuelto, pero es feo devolver un puntero potencialmente liberado. Anularlo ayudar\u00e1 con los backports porque los kernels anteriores usaban el valor de retorno. Ahora la compilaci\u00f3n se interrumpir\u00e1 en los n\u00facleos en los que este parche no sea una soluci\u00f3n completa. Resumen de la pila de llamadas: [usar] l2cap_bredr_sig_cmd l2cap_connect ? mutex_lock(\u0026amp;conn-\u0026gt;chan_lock); ? chan = pchan-\u0026gt;ops-\u0026gt;new_connection(pchan); \u0026lt;-alloc chan? __l2cap_chan_add(conexi\u00f3n, chan); ? l2cap_chan_hold(chan); ? list_add(\u0026amp;chan-\u0026gt;lista, \u0026amp;conn-\u0026gt;chan_l); ... (1) ? mutex_unlock(\u0026amp;conn-\u0026gt;chan_lock); chan-\u0026gt;conf_state... (4) \u0026lt;- usar despu\u00e9s de gratis [gratis] l2cap_conn_del? mutex_lock(\u0026amp;conn-\u0026gt;chan_lock); ? foreach chan en conn-\u0026gt;chan_l: ... (2)? l2cap_chan_put(chan); ? l2cap_chan_destroy? kfree(chan) ... (3) \u0026lt;- chan liberado? mutex_unlock(\u0026amp;conn-\u0026gt;chan_lock); ==================================================== ================ ERROR: KASAN: slab-use-after-free en instrument_atomic_read include/linux/instrumented.h:68 [en l\u00ednea] ERROR: KASAN: slab-use-after -free en _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [en l\u00ednea] ERROR: KASAN: slab-use-after-free en l2cap_connect+0xa67/0x11a0 net/bluetooth/l2cap_core.c:4260 Lectura del tama\u00f1o 8 en addr ffff88810bf040a0 por tarea kworker/u3:1/311\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\",\"baseScore\":6.8,\"baseSeverity\":\"MEDIUM\"},\"exploitabilityScore\":0.9,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4d7b41c0e43995b0e992b9f8903109275744b658\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/826af9d2f69567c646ff46d10393d47e30ad23c6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cfe560c7050bfb37b0d2491bbe7cd8b59e77fdc5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- Confirmed: The vulnerability is confirmed from an analyst perspective.
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