FKIE_CVE-2024-35853

Vulnerability from fkie_nvd - Published: 2024-05-17 15:15 - Updated: 2025-04-07 19:03
Severity ?
6.4 (Medium) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum_acl_tcam: Fix memory leak during rehash The rehash delayed work migrates filters from one region to another. This is done by iterating over all chunks (all the filters with the same priority) in the region and in each chunk iterating over all the filters. If the migration fails, the code tries to migrate the filters back to the old region. However, the rollback itself can also fail in which case another migration will be erroneously performed. Besides the fact that this ping pong is not a very good idea, it also creates a problem. Each virtual chunk references two chunks: The currently used one ('vchunk->chunk') and a backup ('vchunk->chunk2'). During migration the first holds the chunk we want to migrate filters to and the second holds the chunk we are migrating filters from. The code currently assumes - but does not verify - that the backup chunk does not exist (NULL) if the currently used chunk does not reference the target region. This assumption breaks when we are trying to rollback a rollback, resulting in the backup chunk being overwritten and leaked [1]. Fix by not rolling back a failed rollback and add a warning to avoid future cases. [1] WARNING: CPU: 5 PID: 1063 at lib/parman.c:291 parman_destroy+0x17/0x20 Modules linked in: CPU: 5 PID: 1063 Comm: kworker/5:11 Tainted: G W 6.9.0-rc2-custom-00784-gc6a05c468a0b #14 Hardware name: Mellanox Technologies Ltd. MSN3700/VMOD0005, BIOS 5.11 01/06/2019 Workqueue: mlxsw_core mlxsw_sp_acl_tcam_vregion_rehash_work RIP: 0010:parman_destroy+0x17/0x20 [...] Call Trace: <TASK> mlxsw_sp_acl_atcam_region_fini+0x19/0x60 mlxsw_sp_acl_tcam_region_destroy+0x49/0xf0 mlxsw_sp_acl_tcam_vregion_rehash_work+0x1f1/0x470 process_one_work+0x151/0x370 worker_thread+0x2cb/0x3e0 kthread+0xd0/0x100 ret_from_fork+0x34/0x50 ret_from_fork_asm+0x1a/0x30 </TASK>
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0ae8ff7b6d42e33943af462910bdcfa2ec0cb8cfPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/413a01886c3958d4b8aac23a3bff3d430b92093ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/617e98ba4c50f4547c9eb0946b1cfc26937d70d1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8ca3f7a7b61393804c46f170743c3b839df13977Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b3fd51f684a0711504f82de510da109ae639722dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b822644fd90992ee362c5e0c8d2556efc8856c76Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c6f3fa7f5a748bf6e5c4eb742686d6952f854e76Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0ae8ff7b6d42e33943af462910bdcfa2ec0cb8cfPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/413a01886c3958d4b8aac23a3bff3d430b92093ePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/617e98ba4c50f4547c9eb0946b1cfc26937d70d1Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8ca3f7a7b61393804c46f170743c3b839df13977Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b3fd51f684a0711504f82de510da109ae639722dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b822644fd90992ee362c5e0c8d2556efc8856c76Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c6f3fa7f5a748bf6e5c4eb742686d6952f854e76Patch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlMailing List, Third Party Advisory
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.9
linux linux_kernel 6.9
linux linux_kernel 6.9
linux linux_kernel 6.9
linux linux_kernel 6.9
debian debian_linux 10.0
To clipboard 

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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmlxsw: spectrum_acl_tcam: Fix memory leak during rehash\n\nThe rehash delayed work migrates filters from one region to another.\nThis is done by iterating over all chunks (all the filters with the same\npriority) in the region and in each chunk iterating over all the\nfilters.\n\nIf the migration fails, the code tries to migrate the filters back to\nthe old region. However, the rollback itself can also fail in which case\nanother migration will be erroneously performed. Besides the fact that\nthis ping pong is not a very good idea, it also creates a problem.\n\nEach virtual chunk references two chunks: The currently used one\n(\u0027vchunk-\u003echunk\u0027) and a backup (\u0027vchunk-\u003echunk2\u0027). During migration the\nfirst holds the chunk we want to migrate filters to and the second holds\nthe chunk we are migrating filters from.\n\nThe code currently assumes - but does not verify - that the backup chunk\ndoes not exist (NULL) if the currently used chunk does not reference the\ntarget region. This assumption breaks when we are trying to rollback a\nrollback, resulting in the backup chunk being overwritten and leaked\n[1].\n\nFix by not rolling back a failed rollback and add a warning to avoid\nfuture cases.\n\n[1]\nWARNING: CPU: 5 PID: 1063 at lib/parman.c:291 parman_destroy+0x17/0x20\nModules linked in:\nCPU: 5 PID: 1063 Comm: kworker/5:11 Tainted: G        W          6.9.0-rc2-custom-00784-gc6a05c468a0b #14\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:parman_destroy+0x17/0x20\n[...]\nCall Trace:\n \u003cTASK\u003e\n mlxsw_sp_acl_atcam_region_fini+0x19/0x60\n mlxsw_sp_acl_tcam_region_destroy+0x49/0xf0\n mlxsw_sp_acl_tcam_vregion_rehash_work+0x1f1/0x470\n process_one_work+0x151/0x370\n worker_thread+0x2cb/0x3e0\n kthread+0xd0/0x100\n ret_from_fork+0x34/0x50\n ret_from_fork_asm+0x1a/0x30\n \u003c/TASK\u003e"
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      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: mlxsw: spectrum_acl_tcam: corrige la p\u00e9rdida de memoria durante el rehash El trabajo retrasado del rehash migra los filtros de una regi\u00f3n a otra. Esto se hace iterando sobre todos los fragmentos (todos los filtros con la misma prioridad) en la regi\u00f3n y en cada fragmento iterando sobre todos los filtros. Si la migraci\u00f3n fallo, el c\u00f3digo intenta migrar los filtros nuevamente a la regi\u00f3n anterior. Sin embargo, la reversi\u00f3n en s\u00ed tambi\u00e9n puede fallor, en cuyo caso se realizar\u00e1 otra migraci\u00f3n por error. Adem\u00e1s de que este ping pong no es una muy buena idea, tambi\u00e9n crea un problema. Cada fragmento virtual hace referencia a dos fragmentos: el que se utiliza actualmente (\u0027vchunk-\u0026gt;chunk\u0027) y una copia de seguridad (\u0027vchunk-\u0026gt;chunk2\u0027). Durante la migraci\u00f3n, el primero contiene el fragmento al que queremos migrar los filtros y el segundo contiene el fragmento desde el que estamos migrando los filtros. Actualmente, el c\u00f3digo supone, pero no verifica, que el fragmento de copia de seguridad no existe (NULL) si el fragmento utilizado actualmente no hace referencia a la regi\u00f3n de destino. Esta suposici\u00f3n se rompe cuando intentamos revertir una reversi\u00f3n, lo que provoca que el fragmento de copia de seguridad se sobrescriba y se filtre [1]. Corrija al no revertir una reversi\u00f3n fallida y agregue una advertencia para evitar casos futuros. [1] ADVERTENCIA: CPU: 5 PID: 1063 en lib/parman.c:291 parman_destroy+0x17/0x20 M\u00f3dulos vinculados en: CPU: 5 PID: 1063 Comm: kworker/5:11 Tainted: GW 6.9.0-rc2- custom-00784-gc6a05c468a0b #14 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:parman_destroy+0x17/0x20 [...] :  mlxsw_sp_acl_atcam_region_fini +0x19/0x60 mlxsw_sp_acl_tcam_region_destroy+0x49/0xf0 mlxsw_sp_acl_tcam_vregion_rehash_work+0x1f1/0x470 proceso_one_work+0x151/0x370 trabajador_hilo+0x2cb/0x3e0 kthread+0xd0/0x100 k+0x34/0x50 ret_from_fork_asm+0x1a/0x30 "
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  "id": "CVE-2024-35853",
  "lastModified": "2025-04-07T19:03:01.997",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H",
          "version": "3.1"
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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  "published": "2024-05-17T15:15:22.220",
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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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.
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