CVE-2024-36007
Estado: ModificadaMedia (5.5)—
Detalles técnicos trazas, registros y código del informe original
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mlxsw: espectro_acl_tcam: Advertencia de corrección durante el rehash Como se explicó anteriormente, el trabajo retrasado del rehash migra filtros de una región a otra. Esto se hace iterando sobre todos los fragmentos (todos los filtros con la misma prioridad) en la región y en cada fragmento iterando sobre todos los filtros. Cuando el trabajo se queda sin créditos, almacena el fragmento y la entrada actuales como marcadores en el contexto por trabajo para saber dónde reanudar la migración la próxima vez que se programe el trabajo. En caso de error, el marcador de fragmento se restablece a NULL, pero sin restablecer los marcadores de entrada a pesar de ser relativos a él. Esto puede provocar que la migración se reanude desde una entrada que no pertenece al fragmento que se está migrando. A su vez, esto eventualmente conducirá a que se repita un fragmento como si fuera una entrada. Debido a cómo se definen las dos estructuras, esto no genera símbolos KASAN, sino advertencias como [1]. Para solucionarlo, cree un asistente que restablezca todos los marcadores y llámelo desde todos los lugares donde actualmente solo restablece el marcador de fragmentos. Por si acaso, llámelo también al iniciar un rehash completamente nuevo. Agregue una advertencia para evitar casos futuros. [1] ADVERTENCIA: CPU: 7 PID: 1076 en drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_keys.c:407 mlxsw_afk_encode+0x242/0x2f0 Módulos vinculados en: CPU: 7 PID: 1076 Comm: kworker/7:24 Tainted : GW 6.9.0-rc3-custom-00880-g29e61d91b77b #29 Nombre del hardware: Mellanox Technologies Ltd. MSN3700/VMOD0005, BIOS 5.11 06/01/2019 Cola de trabajo: mlxsw_core mlxsw_sp_acl_tcam_vregion_rehash_work RIP 0010:mlxsw_af k_encode+0x242/0x2f0 [... ] Seguimiento de llamadas: mlxsw_sp_acl_atcam_entry_add+0xd9/0x3c0 mlxsw_sp_acl_tcam_entry_create+0x5e/0xa0 mlxsw_sp_acl_tcam_vchunk_migrate_all+0x109/0x290 mlxsw_sp_acl_tcam_vregion_rehash_work+0x6 c/0x470 process_one_work+0x151/0x370 worker_thread+0x2cb/0x3e0 kthread+0xd0/0x100 ret_from_fork+0x34/0x50
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.23%
- Percentil entre todas las CVEs puntuadas: 13
- Fecha de la puntuación: 8/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (2)
CWE
- NVD-CWE-noinfo
Referencias
- https://git.kernel.org/stable/c/039992b6d2df097c65f480dcf269de3d2656f573
- https://git.kernel.org/stable/c/0b88631855026b55cad901ac28d081e0f358e596
- https://git.kernel.org/stable/c/17e9e0bbae652b9b2049e51699e93dfa60b2988d
- https://git.kernel.org/stable/c/1d76bd2a0034d0d08045c1c6adf2235d88982952
- https://git.kernel.org/stable/c/743edc8547a92b6192aa1f1b6bb78233fa21dc9b
- https://git.kernel.org/stable/c/751d352858108314efd33dddd5a9a2b6bf7d6916
- https://git.kernel.org/stable/c/e890456051fe8c57944b911defb3e6de91315861
- https://git.kernel.org/stable/c/039992b6d2df097c65f480dcf269de3d2656f573
- https://git.kernel.org/stable/c/0b88631855026b55cad901ac28d081e0f358e596
- https://git.kernel.org/stable/c/17e9e0bbae652b9b2049e51699e93dfa60b2988d
- https://git.kernel.org/stable/c/1d76bd2a0034d0d08045c1c6adf2235d88982952
- https://git.kernel.org/stable/c/743edc8547a92b6192aa1f1b6bb78233fa21dc9b
- https://git.kernel.org/stable/c/751d352858108314efd33dddd5a9a2b6bf7d6916
- https://git.kernel.org/stable/c/e890456051fe8c57944b911defb3e6de91315861
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-613116.html
JSON original (NVD)
Mostrar
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"source": "af854a3a-2127-422b-91ae-364da2661108"
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{
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"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"
},
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-613116.html",
"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"
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"vulnStatus": "Modified",
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"source": "nvd@nist.gov",
"description": [
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"value": "NVD-CWE-noinfo"
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmlxsw: spectrum_acl_tcam: Fix warning during rehash\n\nAs previously explained, the rehash delayed work migrates filters from\none region to another. This is done by iterating over all chunks (all\nthe filters with the same priority) in the region and in each chunk\niterating over all the filters.\n\nWhen the work runs out of credits it stores the current chunk and entry\nas markers in the per-work context so that it would know where to resume\nthe migration from the next time the work is scheduled.\n\nUpon error, the chunk marker is reset to NULL, but without resetting the\nentry markers despite being relative to it. This can result in migration\nbeing resumed from an entry that does not belong to the chunk being\nmigrated. In turn, this will eventually lead to a chunk being iterated\nover as if it is an entry. Because of how the two structures happen to\nbe defined, this does not lead to KASAN splats, but to warnings such as\n[1].\n\nFix by creating a helper that resets all the markers and call it from\nall the places the currently only reset the chunk marker. For good\nmeasures also call it when starting a completely new rehash. Add a\nwarning to avoid future cases.\n\n[1]\nWARNING: CPU: 7 PID: 1076 at drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_keys.c:407 mlxsw_afk_encode+0x242/0x2f0\nModules linked in:\nCPU: 7 PID: 1076 Comm: kworker/7:24 Tainted: G W 6.9.0-rc3-custom-00880-g29e61d91b77b #29\nHardware name: Mellanox Technologies Ltd. MSN3700/VMOD0005, BIOS 5.11 01/06/2019\nWorkqueue: mlxsw_core mlxsw_sp_acl_tcam_vregion_rehash_work\nRIP: 0010:mlxsw_afk_encode+0x242/0x2f0\n[...]\nCall Trace:\n <TASK>\n mlxsw_sp_acl_atcam_entry_add+0xd9/0x3c0\n mlxsw_sp_acl_tcam_entry_create+0x5e/0xa0\n mlxsw_sp_acl_tcam_vchunk_migrate_all+0x109/0x290\n mlxsw_sp_acl_tcam_vregion_rehash_work+0x6c/0x470\n process_one_work+0x151/0x370\n worker_thread+0x2cb/0x3e0\n kthread+0xd0/0x100\n ret_from_fork+0x34/0x50\n </TASK>"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mlxsw: espectro_acl_tcam: Advertencia de corrección durante el rehash Como se explicó anteriormente, el trabajo retrasado del rehash migra filtros de una región a otra. Esto se hace iterando sobre todos los fragmentos (todos los filtros con la misma prioridad) en la región y en cada fragmento iterando sobre todos los filtros. Cuando el trabajo se queda sin créditos, almacena el fragmento y la entrada actuales como marcadores en el contexto por trabajo para saber dónde reanudar la migración la próxima vez que se programe el trabajo. En caso de error, el marcador de fragmento se restablece a NULL, pero sin restablecer los marcadores de entrada a pesar de ser relativos a él. Esto puede provocar que la migración se reanude desde una entrada que no pertenece al fragmento que se está migrando. A su vez, esto eventualmente conducirá a que se repita un fragmento como si fuera una entrada. Debido a cómo se definen las dos estructuras, esto no genera símbolos KASAN, sino advertencias como [1]. Para solucionarlo, cree un asistente que restablezca todos los marcadores y llámelo desde todos los lugares donde actualmente solo restablece el marcador de fragmentos. Por si acaso, llámelo también al iniciar un rehash completamente nuevo. Agregue una advertencia para evitar casos futuros. [1] ADVERTENCIA: CPU: 7 PID: 1076 en drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_keys.c:407 mlxsw_afk_encode+0x242/0x2f0 Módulos vinculados en: CPU: 7 PID: 1076 Comm: kworker/7:24 Tainted : GW 6.9.0-rc3-custom-00880-g29e61d91b77b #29 Nombre del hardware: Mellanox Technologies Ltd. MSN3700/VMOD0005, BIOS 5.11 06/01/2019 Cola de trabajo: mlxsw_core mlxsw_sp_acl_tcam_vregion_rehash_work RIP 0010:mlxsw_af k_encode+0x242/0x2f0 [... ] Seguimiento de llamadas: mlxsw_sp_acl_atcam_entry_add+0xd9/0x3c0 mlxsw_sp_acl_tcam_entry_create+0x5e/0xa0 mlxsw_sp_acl_tcam_vchunk_migrate_all+0x109/0x290 mlxsw_sp_acl_tcam_vregion_rehash_work+0x6 c/0x470 process_one_work+0x151/0x370 worker_thread+0x2cb/0x3e0 kthread+0xd0/0x100 ret_from_fork+0x34/0x50 "
}
],
"lastModified": "2026-08-04T11:18:21.327",
"configurations": [
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