CVE-2026-89730 (GCVE-0-2026-89730)
Vulnerability from cvelistv5
Published
2026-09-11 19:46
Modified
2026-10-19 08:51
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: fpga: altera-cvp: Avoid out-of-bounds read in trailing byte write The trailing byte path in altera_cvp_send_block() dereferences a u32 pointer even when only 1-3 bytes remain in the input buffer. If the buffer ends at a page or scatterlist boundary, this can read past the valid image data and fault. Copy the remaining bytes into a zero-initialized u32 before writing the final word so only valid bytes are read from the input buffer.
References
Impacted products
Vendor Product Version
Linux Linux Version: 34d1dc17ce978ae76e676d401b48fe9d004aa948
Version: 34d1dc17ce978ae76e676d401b48fe9d004aa948
Version: 34d1dc17ce978ae76e676d401b48fe9d004aa948
Version: 34d1dc17ce978ae76e676d401b48fe9d004aa948
Version: 34d1dc17ce978ae76e676d401b48fe9d004aa948
Version: 34d1dc17ce978ae76e676d401b48fe9d004aa948
Version: 34d1dc17ce978ae76e676d401b48fe9d004aa948
Version: 34d1dc17ce978ae76e676d401b48fe9d004aa948
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{
  "containers": {
    "cna": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/fpga/altera-cvp.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.14"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
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            },
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              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.109",
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            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "7.2.4",
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            },
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "vulnerable": true
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfpga: altera-cvp: Avoid out-of-bounds read in trailing byte write\n\nThe trailing byte path in altera_cvp_send_block() dereferences a u32\npointer even when only 1-3 bytes remain in the input buffer. If the buffer\nends at a page or scatterlist boundary, this can read past the valid image\ndata and fault.\n\nCopy the remaining bytes into a zero-initialized u32 before writing the\nfinal word so only valid bytes are read from the input buffer."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:51:43.578Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/447b3c893987a0106a65f04b62ec3271892e9d98"
        },
        {
          "url": "https://git.kernel.org/stable/c/3b8938f5fbcf4a918785f9cb4b108782eb4ea717"
        },
        {
          "url": "https://git.kernel.org/stable/c/2564ac3d3b8b47cd9692a5bf42d668ed7218b54e"
        },
        {
          "url": "https://git.kernel.org/stable/c/8f3365ed2a5db2ac95ab70a6c47561db39d24537"
        },
        {
          "url": "https://git.kernel.org/stable/c/b138bc665e21d4422382ab43aebdf0a2b7bb9cb3"
        },
        {
          "url": "https://git.kernel.org/stable/c/827ec385458adeeda651de2b6f3537e386b1a8d9"
        },
        {
          "url": "https://git.kernel.org/stable/c/4dc1051939e499c838229af035464a5fc7671198"
        },
        {
          "url": "https://git.kernel.org/stable/c/9da70a43b5fea60d758137f7f0ccfe19356cb5bb"
        }
      ],
      "title": "fpga: altera-cvp: Avoid out-of-bounds read in trailing byte write",
      "x_generator": {
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      }
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89730",
    "datePublished": "2026-09-11T19:46:40.581Z",
    "dateReserved": "2026-09-11T19:38:34.760Z",
    "dateUpdated": "2026-10-19T08:51:43.578Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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