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CVE-2026-89730 (GCVE-0-2026-89730)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:46 – Updated: 2026-09-14 12:02
VLAI
Title
fpga: altera-cvp: Avoid out-of-bounds read in trailing byte write
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 34d1dc17ce978ae76e676d401b48fe9d004aa948 , < 447b3c893987a0106a65f04b62ec3271892e9d98 (git)
Affected: 34d1dc17ce978ae76e676d401b48fe9d004aa948 , < 3b8938f5fbcf4a918785f9cb4b108782eb4ea717 (git)
Affected: 34d1dc17ce978ae76e676d401b48fe9d004aa948 , < 2564ac3d3b8b47cd9692a5bf42d668ed7218b54e (git)
Affected: 34d1dc17ce978ae76e676d401b48fe9d004aa948 , < 8f3365ed2a5db2ac95ab70a6c47561db39d24537 (git)
Affected: 34d1dc17ce978ae76e676d401b48fe9d004aa948 , < b138bc665e21d4422382ab43aebdf0a2b7bb9cb3 (git)
Affected: 34d1dc17ce978ae76e676d401b48fe9d004aa948 , < 827ec385458adeeda651de2b6f3537e386b1a8d9 (git)
Affected: 34d1dc17ce978ae76e676d401b48fe9d004aa948 , < 4dc1051939e499c838229af035464a5fc7671198 (git)
Affected: 34d1dc17ce978ae76e676d401b48fe9d004aa948 , < 9da70a43b5fea60d758137f7f0ccfe19356cb5bb (git)
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Linux Linux Affected: 4.14
Unaffected: 0 , < 4.14 (semver)
Unaffected: 5.10.270 , ≤ 5.10.* (semver)
Unaffected: 5.15.221 , ≤ 5.15.* (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.109 , ≤ 6.12.* (semver)
Unaffected: 6.18.50 , ≤ 6.18.* (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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          "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."
        }
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    "dateReserved": "2026-09-11T19:38:34.760Z",
    "dateUpdated": "2026-09-14T12:02:19.217Z",
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-15T05:13:15+00:00",
      "cve": "CVE-2026-89730",
      "id": "CVE-2026-89730",
      "initial_release_date": "2026-09-11T19:46:40.581000+00:00",
      "product_status:known_affected": "2",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Out-of-bounds read in altera-cvp FPGA driver can lead to system crash",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89730.json",
      "version": "3"
    }
  }
}



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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

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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.


Detection rules are retrieved from Rulezet.