ghsa-x4wx-6qj6-2hp3
Vulnerability from github
Published
2025-03-10 21:31
Modified
2025-03-10 21:31
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

spi: bcm2835: bcm2835_spi_handle_err(): fix NULL pointer deref for non DMA transfers

In case a IRQ based transfer times out the bcm2835_spi_handle_err() function is called. Since commit 1513ceee70f2 ("spi: bcm2835: Drop dma_pending flag") the TX and RX DMA transfers are unconditionally canceled, leading to NULL pointer derefs if ctlr->dma_tx or ctlr->dma_rx are not set.

Fix the NULL pointer deref by checking that ctlr->dma_tx and ctlr->dma_rx are valid pointers before accessing them.

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49569"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:01:32Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: bcm2835: bcm2835_spi_handle_err(): fix NULL pointer deref for non DMA transfers\n\nIn case a IRQ based transfer times out the bcm2835_spi_handle_err()\nfunction is called. Since commit 1513ceee70f2 (\"spi: bcm2835: Drop\ndma_pending flag\") the TX and RX DMA transfers are unconditionally\ncanceled, leading to NULL pointer derefs if ctlr-\u003edma_tx or\nctlr-\u003edma_rx are not set.\n\nFix the NULL pointer deref by checking that ctlr-\u003edma_tx and\nctlr-\u003edma_rx are valid pointers before accessing them.",
  "id": "GHSA-x4wx-6qj6-2hp3",
  "modified": "2025-03-10T21:31:10Z",
  "published": "2025-03-10T21:31:10Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49569"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/49ffa473218012e765682343de2052eb4c1f06a7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4ceaa684459d414992acbefb4e4c31f2dfc50641"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/58466e05390043d2805685c70f55f3f59711bdf2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/684896e675edd8b669fd3e9f547c5038222d85bc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/76668d2a2f367d25ff448e6d7087406af7d7bb2b"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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