CVE-2022-49522

Estado: AnalizadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

mmc: jz4740: Apply DMA engine limits to maximum segment size

Do what is done in other DMA-enabled MMC host drivers (cf. host/mmci.c) and limit the maximum segment size based on the DMA engine's capabilities. This is needed to avoid warnings like the following with CONFIG_DMA_API_DEBUG=y.

Detalles técnicos trazas, registros y código del informe original

------------[ cut here ]------------
WARNING: CPU: 0 PID: 21 at kernel/dma/debug.c:1162 debug_dma_map_sg+0x2f4/0x39c
DMA-API: jz4780-dma 13420000.dma-controller: mapping sg segment longer than device claims to support [len=98304] [max=65536]
CPU: 0 PID: 21 Comm: kworker/0:1H Not tainted 5.18.0-rc1 #19
Workqueue: kblockd blk_mq_run_work_fn
Stack : 81575aec 00000004 80620000 80620000 80620000 805e7358 00000009 801537ac
        814c832c 806276e3 806e34b4 80620000 81575aec 00000001 81575ab8 09291444
        00000000 00000000 805e7358 81575958 ffffffea 8157596c 00000000 636f6c62
        6220646b 80387a70 0000000f 6d5f6b6c 80620000 00000000 81575ba4 00000009
        805e170c 80896640 00000001 00010000 00000000 00000000 00006098 806e0000
        ...
Call Trace:
[<80107670>] show_stack+0x84/0x120
[<80528cd8>] __warn+0xb8/0xec
[<80528d78>] warn_slowpath_fmt+0x6c/0xb8
[<8016f1d4>] debug_dma_map_sg+0x2f4/0x39c
[<80169d4c>] __dma_map_sg_attrs+0xf0/0x118
[<8016a27c>] dma_map_sg_attrs+0x14/0x28
[<804f66b4>] jz4740_mmc_prepare_dma_data+0x74/0xa4
[<804f6714>] jz4740_mmc_pre_request+0x30/0x54
[<804f4ff4>] mmc_blk_mq_issue_rq+0x6e0/0x7bc
[<804f5590>] mmc_mq_queue_rq+0x220/0x2d4
[<8038b2c0>] blk_mq_dispatch_rq_list+0x480/0x664
[<80391040>] blk_mq_do_dispatch_sched+0x2dc/0x370
[<80391468>] __blk_mq_sched_dispatch_requests+0xec/0x164
[<80391540>] blk_mq_sched_dispatch_requests+0x44/0x94
[<80387900>] __blk_mq_run_hw_queue+0xb0/0xcc
[<80134c14>] process_one_work+0x1b8/0x264
[<80134ff8>] worker_thread+0x2ec/0x3b8
[<8013b13c>] kthread+0x104/0x10c
[<80101dcc>] ret_from_kernel_thread+0x14/0x1c

---[ end trace 0000000000000000 ]---

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: 0.26%
Percentil entre todas las CVEs puntuadas: 16
Fecha de la puntuación: 5/10/2026

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 (1)

Linux — Linux Kernel

CWE

NVD-CWE-noinfo

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2022-49522",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
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              "lessThan": "353298cadbd4c7d8e8a16d6000066414694933c3",
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              "status": "affected",
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              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/mmc/host/jz4740_mmc.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
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              "version": "0",
              "lessThan": "3.18",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.4.198",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "status": "unaffected",
              "version": "5.10.121",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.46",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "5.17.14",
              "versionType": "semver",
              "lessThanOrEqual": "5.17.*"
            },
            {
              "status": "unaffected",
              "version": "5.18.3",
              "versionType": "semver",
              "lessThanOrEqual": "5.18.*"
            },
            {
              "status": "unaffected",
              "version": "5.19",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/mmc/host/jz4740_mmc.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-02-26T07:01:28.210",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/353298cadbd4c7d8e8a16d6000066414694933c3",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7923f95997a79cef2ad161a2facae64c25a0bca0",
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    {
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    },
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      "tags": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
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      "tags": [
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      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
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      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: jz4740: Apply DMA engine limits to maximum segment size\n\nDo what is done in other DMA-enabled MMC host drivers (cf. host/mmci.c) and\nlimit the maximum segment size based on the DMA engine's capabilities. This\nis needed to avoid warnings like the following with CONFIG_DMA_API_DEBUG=y.\n\n------------[ cut here ]------------\nWARNING: CPU: 0 PID: 21 at kernel/dma/debug.c:1162 debug_dma_map_sg+0x2f4/0x39c\nDMA-API: jz4780-dma 13420000.dma-controller: mapping sg segment longer than device claims to support [len=98304] [max=65536]\nCPU: 0 PID: 21 Comm: kworker/0:1H Not tainted 5.18.0-rc1 #19\nWorkqueue: kblockd blk_mq_run_work_fn\nStack : 81575aec 00000004 80620000 80620000 80620000 805e7358 00000009 801537ac\n        814c832c 806276e3 806e34b4 80620000 81575aec 00000001 81575ab8 09291444\n        00000000 00000000 805e7358 81575958 ffffffea 8157596c 00000000 636f6c62\n        6220646b 80387a70 0000000f 6d5f6b6c 80620000 00000000 81575ba4 00000009\n        805e170c 80896640 00000001 00010000 00000000 00000000 00006098 806e0000\n        ...\nCall Trace:\n[<80107670>] show_stack+0x84/0x120\n[<80528cd8>] __warn+0xb8/0xec\n[<80528d78>] warn_slowpath_fmt+0x6c/0xb8\n[<8016f1d4>] debug_dma_map_sg+0x2f4/0x39c\n[<80169d4c>] __dma_map_sg_attrs+0xf0/0x118\n[<8016a27c>] dma_map_sg_attrs+0x14/0x28\n[<804f66b4>] jz4740_mmc_prepare_dma_data+0x74/0xa4\n[<804f6714>] jz4740_mmc_pre_request+0x30/0x54\n[<804f4ff4>] mmc_blk_mq_issue_rq+0x6e0/0x7bc\n[<804f5590>] mmc_mq_queue_rq+0x220/0x2d4\n[<8038b2c0>] blk_mq_dispatch_rq_list+0x480/0x664\n[<80391040>] blk_mq_do_dispatch_sched+0x2dc/0x370\n[<80391468>] __blk_mq_sched_dispatch_requests+0xec/0x164\n[<80391540>] blk_mq_sched_dispatch_requests+0x44/0x94\n[<80387900>] __blk_mq_run_hw_queue+0xb0/0xcc\n[<80134c14>] process_one_work+0x1b8/0x264\n[<80134ff8>] worker_thread+0x2ec/0x3b8\n[<8013b13c>] kthread+0x104/0x10c\n[<80101dcc>] ret_from_kernel_thread+0x14/0x1c\n\n---[ end trace 0000000000000000 ]---"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mmc: jz4740: Aplicar límites del motor DMA al tamaño máximo de segmento. Haga lo que se hace en otros controladores de host MMC habilitados para DMA (cf. host/mmci.c) y limite el tamaño máximo de segmento en función de las capacidades del motor DMA. Esto es necesario para evitar advertencias como la siguiente con CONFIG_DMA_API_DEBUG=y. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 21 at kernel/dma/debug.c:1162 debug_dma_map_sg+0x2f4/0x39c DMA-API: jz4780-dma 13420000.dma-controller: mapping sg segment longer than device claims to support [len=98304] [max=65536] CPU: 0 PID: 21 Comm: kworker/0:1H Not tainted 5.18.0-rc1 #19 Workqueue: kblockd blk_mq_run_work_fn Stack : 81575aec 00000004 80620000 80620000 80620000 805e7358 00000009 801537ac 814c832c 806276e3 806e34b4 80620000 81575aec 00000001 81575ab8 09291444 00000000 00000000 805e7358 81575958 ffffffea 8157596c 00000000 636f6c62 6220646b 80387a70 0000000f 6d5f6b6c 80620000 00000000 81575ba4 00000009 805e170c 80896640 00000001 00010000 00000000 00000000 00006098 806e0000 ... Call Trace: [&lt;80107670&gt;] show_stack+0x84/0x120 [&lt;80528cd8&gt;] __warn+0xb8/0xec [&lt;80528d78&gt;] warn_slowpath_fmt+0x6c/0xb8 [&lt;8016f1d4&gt;] debug_dma_map_sg+0x2f4/0x39c [&lt;80169d4c&gt;] __dma_map_sg_attrs+0xf0/0x118 [&lt;8016a27c&gt;] dma_map_sg_attrs+0x14/0x28 [&lt;804f66b4&gt;] jz4740_mmc_prepare_dma_data+0x74/0xa4 [&lt;804f6714&gt;] jz4740_mmc_pre_request+0x30/0x54 [&lt;804f4ff4&gt;] mmc_blk_mq_issue_rq+0x6e0/0x7bc [&lt;804f5590&gt;] mmc_mq_queue_rq+0x220/0x2d4 [&lt;8038b2c0&gt;] blk_mq_dispatch_rq_list+0x480/0x664 [&lt;80391040&gt;] blk_mq_do_dispatch_sched+0x2dc/0x370 [&lt;80391468&gt;] __blk_mq_sched_dispatch_requests+0xec/0x164 [&lt;80391540&gt;] blk_mq_sched_dispatch_requests+0x44/0x94 [&lt;80387900&gt;] __blk_mq_run_hw_queue+0xb0/0xcc [&lt;80134c14&gt;] process_one_work+0x1b8/0x264 [&lt;80134ff8&gt;] worker_thread+0x2ec/0x3b8 [&lt;8013b13c&gt;] kthread+0x104/0x10c [&lt;80101dcc&gt;] ret_from_kernel_thread+0x14/0x1c ---[ end trace 0000000000000000 ]--- "
    }
  ],
  "lastModified": "2026-06-17T05:18:18.853",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C1C86ABC-337F-46B3-BCD8-22DC5A66E45A",
              "versionEndExcluding": "5.4.198"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "34ACD872-E5BC-401C-93D5-B357A62426E0",
              "versionEndExcluding": "5.10.121",
              "versionStartIncluding": "5.5"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "20D41697-0E8B-4B7D-8842-F17BF2AA21E1",
              "versionEndExcluding": "5.15.46",
              "versionStartIncluding": "5.11"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "15E2DD33-2255-4B76-9C15-04FF8CBAB252",
              "versionEndExcluding": "5.17.14",
              "versionStartIncluding": "5.16"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8E122216-2E9E-4B3E-B7B8-D575A45BA3C2",
              "versionEndExcluding": "5.18.3",
              "versionStartIncluding": "5.18"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}