CVE-2025-68352 (GCVE-0-2025-68352)
Vulnerability from cvelistv5
Published
2025-12-24 10:32
Modified
2025-12-24 10:32
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: spi: ch341: fix out-of-bounds memory access in ch341_transfer_one Discovered by Atuin - Automated Vulnerability Discovery Engine. The 'len' variable is calculated as 'min(32, trans->len + 1)', which includes the 1-byte command header. When copying data from 'trans->tx_buf' to 'ch341->tx_buf + 1', using 'len' as the length is incorrect because: 1. It causes an out-of-bounds read from 'trans->tx_buf' (which has size 'trans->len', i.e., 'len - 1' in this context). 2. It can cause an out-of-bounds write to 'ch341->tx_buf' if 'len' is CH341_PACKET_LENGTH (32). Writing 32 bytes to ch341->tx_buf + 1 overflows the buffer. Fix this by copying 'len - 1' bytes.
References
Impacted products
Vendor Product Version
Linux Linux Version: 8846739f52afa07e63395c80227dc544f54bd7b1
Version: 8846739f52afa07e63395c80227dc544f54bd7b1
Version: 8846739f52afa07e63395c80227dc544f54bd7b1
Version: 8846739f52afa07e63395c80227dc544f54bd7b1
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/spi/spi-ch341.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
            {
              "lessThan": "6.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.63",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.63",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "6.17.13",
                  "versionStartIncluding": "6.11",
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: ch341: fix out-of-bounds memory access in ch341_transfer_one\n\nDiscovered by Atuin - Automated Vulnerability Discovery Engine.\n\nThe \u0027len\u0027 variable is calculated as \u0027min(32, trans-\u003elen + 1)\u0027,\nwhich includes the 1-byte command header.\n\nWhen copying data from \u0027trans-\u003etx_buf\u0027 to \u0027ch341-\u003etx_buf + 1\u0027, using \u0027len\u0027\nas the length is incorrect because:\n\n1. It causes an out-of-bounds read from \u0027trans-\u003etx_buf\u0027 (which has size\n   \u0027trans-\u003elen\u0027, i.e., \u0027len - 1\u0027 in this context).\n2. It can cause an out-of-bounds write to \u0027ch341-\u003etx_buf\u0027 if \u0027len\u0027 is\n   CH341_PACKET_LENGTH (32). Writing 32 bytes to ch341-\u003etx_buf + 1\n   overflows the buffer.\n\nFix this by copying \u0027len - 1\u0027 bytes."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-24T10:32:43.366Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/cad6c0fd6f3c0e76a1f75df4bce3b08a13f08974"
        },
        {
          "url": "https://git.kernel.org/stable/c/ea1e43966cd03098fcd5f0d72e6c2901d45fa08d"
        },
        {
          "url": "https://git.kernel.org/stable/c/81841da1f30f66a850cc8796d99ba330aad9d696"
        },
        {
          "url": "https://git.kernel.org/stable/c/545d1287e40a55242f6ab68bcc1ba3b74088b1bc"
        }
      ],
      "title": "spi: ch341: fix out-of-bounds memory access in ch341_transfer_one",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68352",
    "datePublished": "2025-12-24T10:32:43.366Z",
    "dateReserved": "2025-12-16T14:48:05.300Z",
    "dateUpdated": "2025-12-24T10:32:43.366Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-68352\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-24T11:15:58.550\",\"lastModified\":\"2025-12-29T15:58:56.260\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nspi: ch341: fix out-of-bounds memory access in ch341_transfer_one\\n\\nDiscovered by Atuin - Automated Vulnerability Discovery Engine.\\n\\nThe \u0027len\u0027 variable is calculated as \u0027min(32, trans-\u003elen + 1)\u0027,\\nwhich includes the 1-byte command header.\\n\\nWhen copying data from \u0027trans-\u003etx_buf\u0027 to \u0027ch341-\u003etx_buf + 1\u0027, using \u0027len\u0027\\nas the length is incorrect because:\\n\\n1. It causes an out-of-bounds read from \u0027trans-\u003etx_buf\u0027 (which has size\\n   \u0027trans-\u003elen\u0027, i.e., \u0027len - 1\u0027 in this context).\\n2. It can cause an out-of-bounds write to \u0027ch341-\u003etx_buf\u0027 if \u0027len\u0027 is\\n   CH341_PACKET_LENGTH (32). Writing 32 bytes to ch341-\u003etx_buf + 1\\n   overflows the buffer.\\n\\nFix this by copying \u0027len - 1\u0027 bytes.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/545d1287e40a55242f6ab68bcc1ba3b74088b1bc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/81841da1f30f66a850cc8796d99ba330aad9d696\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cad6c0fd6f3c0e76a1f75df4bce3b08a13f08974\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ea1e43966cd03098fcd5f0d72e6c2901d45fa08d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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