fkie_cve-2025-68352
Vulnerability from fkie_nvd
Published
2025-12-24 11:15
Modified
2025-12-29 15:58
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/545d1287e40a55242f6ab68bcc1ba3b74088b1bc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/81841da1f30f66a850cc8796d99ba330aad9d696
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cad6c0fd6f3c0e76a1f75df4bce3b08a13f08974
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ea1e43966cd03098fcd5f0d72e6c2901d45fa08d
Impacted products
Vendor Product Version


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{
  "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."
    }
  ],
  "id": "CVE-2025-68352",
  "lastModified": "2025-12-29T15:58:56.260",
  "metrics": {},
  "published": "2025-12-24T11:15:58.550",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "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"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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