CVE-2024-53186 (GCVE-0-2024-53186)

Vulnerability from cvelistv5 – Published: 2024-12-27 13:49 – Updated: 2025-05-04 13:00
VLAI?
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in SMB request handling A race condition exists between SMB request handling in `ksmbd_conn_handler_loop()` and the freeing of `ksmbd_conn` in the workqueue handler `handle_ksmbd_work()`. This leads to a UAF. - KASAN: slab-use-after-free Read in handle_ksmbd_work - KASAN: slab-use-after-free in rtlock_slowlock_locked This race condition arises as follows: - `ksmbd_conn_handler_loop()` waits for `conn->r_count` to reach zero: `wait_event(conn->r_count_q, atomic_read(&conn->r_count) == 0);` - Meanwhile, `handle_ksmbd_work()` decrements `conn->r_count` using `atomic_dec_return(&conn->r_count)`, and if it reaches zero, calls `ksmbd_conn_free()`, which frees `conn`. - However, after `handle_ksmbd_work()` decrements `conn->r_count`, it may still access `conn->r_count_q` in the following line: `waitqueue_active(&conn->r_count_q)` or `wake_up(&conn->r_count_q)` This results in a UAF, as `conn` has already been freed. The discovery of this UAF can be referenced in the following PR for syzkaller's support for SMB requests.
Severity ?
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 18f06bacc197d4ac9b518ad1c69999bc3d83e7aa , < a96f9eb7add30ba0fafcfe7b7aca090978196800 (git)
Affected: e9dac92f4482a382e8c0fe1bc243da5fc3526b0c , < f20b77f7897e6aab9ce5527e6016ad2be5d70a33 (git)
Affected: ee426bfb9d09b29987369b897fe9b6485ac2be27 , < 96261adb998a3b513468b6ce17dbec76be5507d4 (git)
Affected: ee426bfb9d09b29987369b897fe9b6485ac2be27 , < 9a8c5d89d327ff58e9b2517f8a6afb4181d32c6e (git)
Affected: 9fd3cde4628bcd3549ab95061f2bab74d2ed4f3b (git)
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    Linux Linux Affected: 6.12
Unaffected: 0 , < 6.12 (semver)
Unaffected: 6.6.64 , ≤ 6.6.* (semver)
Unaffected: 6.11.11 , ≤ 6.11.* (semver)
Unaffected: 6.12.2 , ≤ 6.12.* (semver)
Unaffected: 6.13 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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    "dateUpdated": "2025-05-04T13:00:39.217Z",
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      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nksmbd: fix use-after-free in SMB request handling\\n\\nA race condition exists between SMB request handling in\\n`ksmbd_conn_handler_loop()` and the freeing of `ksmbd_conn` in the\\nworkqueue handler `handle_ksmbd_work()`. This leads to a UAF.\\n- KASAN: slab-use-after-free Read in handle_ksmbd_work\\n- KASAN: slab-use-after-free in rtlock_slowlock_locked\\n\\nThis race condition arises as follows:\\n- `ksmbd_conn_handler_loop()` waits for `conn-\u003er_count` to reach zero:\\n  `wait_event(conn-\u003er_count_q, atomic_read(\u0026conn-\u003er_count) == 0);`\\n- Meanwhile, `handle_ksmbd_work()` decrements `conn-\u003er_count` using\\n  `atomic_dec_return(\u0026conn-\u003er_count)`, and if it reaches zero, calls\\n  `ksmbd_conn_free()`, which frees `conn`.\\n- However, after `handle_ksmbd_work()` decrements `conn-\u003er_count`,\\n  it may still access `conn-\u003er_count_q` in the following line:\\n  `waitqueue_active(\u0026conn-\u003er_count_q)` or `wake_up(\u0026conn-\u003er_count_q)`\\n  This results in a UAF, as `conn` has already been freed.\\n\\nThe discovery of this UAF can be referenced in the following PR for\\nsyzkaller\u0027s support for SMB requests.\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ksmbd: se corrige el problema de use-after-free en la gesti\\u00f3n de solicitudes SMB Existe una condici\\u00f3n de ejecuci\\u00f3n entre la gesti\\u00f3n de solicitudes SMB en `ksmbd_conn_handler_loop()` y la liberaci\\u00f3n de `ksmbd_conn` en el controlador de cola de trabajo `handle_ksmbd_work()`. Esto conduce a una UAF. - KASAN: slab-use-after-free Leer en handle_ksmbd_work - KASAN: slab-use-after-free en rtlock_slowlock_locked Esta condici\\u00f3n de ejecuci\\u00f3n surge de la siguiente manera: - `ksmbd_conn_handler_loop()` espera a que `conn-\u0026gt;r_count` llegue a cero: `wait_event(conn-\u0026gt;r_count_q, atomic_read(\u0026amp;conn-\u0026gt;r_count) == 0);` - Mientras tanto, `handle_ksmbd_work()` decrementa `conn-\u0026gt;r_count` usando `atomic_dec_return(\u0026amp;conn-\u0026gt;r_count)`, y si llega a cero, llama a `ksmbd_conn_free()`, que libera a `conn`. - Sin embargo, despu\\u00e9s de que `handle_ksmbd_work()` disminuya `conn-\u0026gt;r_count`, a\\u00fan puede acceder a `conn-\u0026gt;r_count_q` en la siguiente l\\u00ednea: `waitqueue_active(\u0026amp;conn-\u0026gt;r_count_q)` o `wake_up(\u0026amp;conn-\u0026gt;r_count_q)` Esto da como resultado un UAF, ya que `conn` ya se ha liberado. Se puede hacer referencia al descubrimiento de este UAF en la siguiente PR para el soporte de syzkaller para solicitudes SMB.\"}]",
      "id": "CVE-2024-53186",
      "lastModified": "2024-12-27T14:15:26.083",
      "published": "2024-12-27T14:15:26.083",
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This leads to a UAF.\\n- KASAN: slab-use-after-free Read in handle_ksmbd_work\\n- KASAN: slab-use-after-free in rtlock_slowlock_locked\\n\\nThis race condition arises as follows:\\n- `ksmbd_conn_handler_loop()` waits for `conn-\u003er_count` to reach zero:\\n  `wait_event(conn-\u003er_count_q, atomic_read(\u0026conn-\u003er_count) == 0);`\\n- Meanwhile, `handle_ksmbd_work()` decrements `conn-\u003er_count` using\\n  `atomic_dec_return(\u0026conn-\u003er_count)`, and if it reaches zero, calls\\n  `ksmbd_conn_free()`, which frees `conn`.\\n- However, after `handle_ksmbd_work()` decrements `conn-\u003er_count`,\\n  it may still access `conn-\u003er_count_q` in the following line:\\n  `waitqueue_active(\u0026conn-\u003er_count_q)` or `wake_up(\u0026conn-\u003er_count_q)`\\n  This results in a UAF, as `conn` has already been freed.\\n\\nThe discovery of this UAF can be referenced in the following PR for\\nsyzkaller\u0027s support for SMB requests.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ksmbd: se corrige el problema de use-after-free en la gesti\u00f3n de solicitudes SMB Existe una condici\u00f3n de ejecuci\u00f3n entre la gesti\u00f3n de solicitudes SMB en `ksmbd_conn_handler_loop()` y la liberaci\u00f3n de `ksmbd_conn` en el controlador de cola de trabajo `handle_ksmbd_work()`. Esto conduce a una UAF. - KASAN: slab-use-after-free Leer en handle_ksmbd_work - KASAN: slab-use-after-free en rtlock_slowlock_locked Esta condici\u00f3n de ejecuci\u00f3n surge de la siguiente manera: - `ksmbd_conn_handler_loop()` espera a que `conn-\u0026gt;r_count` llegue a cero: `wait_event(conn-\u0026gt;r_count_q, atomic_read(\u0026amp;conn-\u0026gt;r_count) == 0);` - Mientras tanto, `handle_ksmbd_work()` decrementa `conn-\u0026gt;r_count` usando `atomic_dec_return(\u0026amp;conn-\u0026gt;r_count)`, y si llega a cero, llama a `ksmbd_conn_free()`, que libera a `conn`. - Sin embargo, despu\u00e9s de que `handle_ksmbd_work()` disminuya `conn-\u0026gt;r_count`, a\u00fan puede acceder a `conn-\u0026gt;r_count_q` en la siguiente l\u00ednea: `waitqueue_active(\u0026amp;conn-\u0026gt;r_count_q)` o `wake_up(\u0026amp;conn-\u0026gt;r_count_q)` Esto da como resultado un UAF, ya que `conn` ya se ha liberado. Se puede hacer referencia al descubrimiento de este UAF en la siguiente PR para el soporte de syzkaller para solicitudes SMB.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.0,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.0,\"impactScore\":5.9},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-362\"},{\"lang\":\"en\",\"value\":\"CWE-416\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.6.55\",\"versionEndExcluding\":\"6.6.64\",\"matchCriteriaId\":\"C813C628-8D83-4585-9CCE-3DE13EBB4454\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.10.14\",\"versionEndExcluding\":\"6.11\",\"matchCriteriaId\":\"41AB04F0-1096-4B39-8148-796AB65AA193\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.11.3\",\"versionEndExcluding\":\"6.11.11\",\"matchCriteriaId\":\"C2F1D9BC-CB2F-488F-90F8-8456CD3C44CB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.12\",\"versionEndExcluding\":\"6.12.2\",\"matchCriteriaId\":\"D8882B1B-2ABC-4838-AC1D-DBDBB5764776\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/96261adb998a3b513468b6ce17dbec76be5507d4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9a8c5d89d327ff58e9b2517f8a6afb4181d32c6e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a96f9eb7add30ba0fafcfe7b7aca090978196800\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f20b77f7897e6aab9ce5527e6016ad2be5d70a33\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-53186\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-02-10T17:13:00.740506Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-02-10T17:13:02.169Z\"}}], \"cna\": {\"title\": \"ksmbd: fix use-after-free in SMB request handling\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"18f06bacc197d4ac9b518ad1c69999bc3d83e7aa\", \"lessThan\": \"a96f9eb7add30ba0fafcfe7b7aca090978196800\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e9dac92f4482a382e8c0fe1bc243da5fc3526b0c\", \"lessThan\": \"f20b77f7897e6aab9ce5527e6016ad2be5d70a33\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ee426bfb9d09b29987369b897fe9b6485ac2be27\", \"lessThan\": \"96261adb998a3b513468b6ce17dbec76be5507d4\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ee426bfb9d09b29987369b897fe9b6485ac2be27\", \"lessThan\": \"9a8c5d89d327ff58e9b2517f8a6afb4181d32c6e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9fd3cde4628bcd3549ab95061f2bab74d2ed4f3b\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/smb/server/server.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.12\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.12\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.6.64\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11.11\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.11.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/smb/server/server.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/a96f9eb7add30ba0fafcfe7b7aca090978196800\"}, {\"url\": \"https://git.kernel.org/stable/c/f20b77f7897e6aab9ce5527e6016ad2be5d70a33\"}, {\"url\": \"https://git.kernel.org/stable/c/96261adb998a3b513468b6ce17dbec76be5507d4\"}, {\"url\": \"https://git.kernel.org/stable/c/9a8c5d89d327ff58e9b2517f8a6afb4181d32c6e\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nksmbd: fix use-after-free in SMB request handling\\n\\nA race condition exists between SMB request handling in\\n`ksmbd_conn_handler_loop()` and the freeing of `ksmbd_conn` in the\\nworkqueue handler `handle_ksmbd_work()`. This leads to a UAF.\\n- KASAN: slab-use-after-free Read in handle_ksmbd_work\\n- KASAN: slab-use-after-free in rtlock_slowlock_locked\\n\\nThis race condition arises as follows:\\n- `ksmbd_conn_handler_loop()` waits for `conn-\u003er_count` to reach zero:\\n  `wait_event(conn-\u003er_count_q, atomic_read(\u0026conn-\u003er_count) == 0);`\\n- Meanwhile, `handle_ksmbd_work()` decrements `conn-\u003er_count` using\\n  `atomic_dec_return(\u0026conn-\u003er_count)`, and if it reaches zero, calls\\n  `ksmbd_conn_free()`, which frees `conn`.\\n- However, after `handle_ksmbd_work()` decrements `conn-\u003er_count`,\\n  it may still access `conn-\u003er_count_q` in the following line:\\n  `waitqueue_active(\u0026conn-\u003er_count_q)` or `wake_up(\u0026conn-\u003er_count_q)`\\n  This results in a UAF, as `conn` has already been freed.\\n\\nThe discovery of this UAF can be referenced in the following PR for\\nsyzkaller\u0027s support for SMB requests.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.64\", \"versionStartIncluding\": \"6.6.55\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11.11\", \"versionStartIncluding\": \"6.11.3\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.2\", \"versionStartIncluding\": \"6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.13\", \"versionStartIncluding\": \"6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"6.10.14\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T13:00:39.217Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-53186\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T13:00:39.217Z\", \"dateReserved\": \"2024-11-19T17:17:25.012Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-12-27T13:49:29.215Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

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  • 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.



Detection rules are retrieved from Rulezet.