FKIE_CVE-2025-68352

Vulnerability from fkie_nvd - Published: 2025-12-24 11:15 - Updated: 2026-10-19 21:10
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "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",
          "versions": [
            {
              "lessThan": "cad6c0fd6f3c0e76a1f75df4bce3b08a13f08974",
              "status": "affected",
              "version": "8846739f52afa07e63395c80227dc544f54bd7b1",
              "versionType": "git"
            },
            {
              "lessThan": "ea1e43966cd03098fcd5f0d72e6c2901d45fa08d",
              "status": "affected",
              "version": "8846739f52afa07e63395c80227dc544f54bd7b1",
              "versionType": "git"
            },
            {
              "lessThan": "81841da1f30f66a850cc8796d99ba330aad9d696",
              "status": "affected",
              "version": "8846739f52afa07e63395c80227dc544f54bd7b1",
              "versionType": "git"
            },
            {
              "lessThan": "545d1287e40a55242f6ab68bcc1ba3b74088b1bc",
              "status": "affected",
              "version": "8846739f52afa07e63395c80227dc544f54bd7b1",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/spi/spi-ch341.c"
          ],
          "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",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "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."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha corregido la siguiente vulnerabilidad:\\n\\nspi: ch341: fix out-of-bounds memory access in ch341_transfer_one\\n\\nDescubierta por Atuin - Automated Vulnerability Discovery Engine.\\n\\nLa variable \u0027len\u0027 se calcula como \u0027min(32, trans -\u003e len + 1)\u0027, lo que incluye el encabezado de comando de 1?byte.\\n\\nAl copiar datos de \u0027trans -\u003e tx_buf\u0027 a \u0027ch341 -\u003e tx_buf + 1\u0027, usar \u0027len\u0027 como longitud es incorrecto porque:\\n\\n1. Provoca una lectura fuera de los l\u00edmites de \u0027trans -\u003e tx_buf\u0027 (que tiene tama\u00f1o \u0027trans -\u003e len\u0027, es decir, \u0027len - 1\u0027 en este contexto).\\n2. Puede provocar una escritura fuera de los l\u00edmites de \u0027ch341 -\u003e tx_buf\u0027 si \u0027len\u0027 es CH341_PACKET_LENGTH (32). Escribir 32?bytes en ch341 -\u003e tx_buf + 1 desborda el b\u00fafer.\\n\\nCorrija esto copiando \u0027len - 1\u0027 bytes."
    }
  ],
  "id": "CVE-2025-68352",
  "lastModified": "2026-10-19T21:10:00.160",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "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": "Deferred"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • 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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.