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CVE-2025-38676 (GCVE-0-2025-38676)

Vulnerability from cvelistv5 – Published: 2025-08-26 13:07 – Updated: 2026-05-23 16:00
VLAI
Title
iommu/amd: Avoid stack buffer overflow from kernel cmdline
Summary
In the Linux kernel, the following vulnerability has been resolved: iommu/amd: Avoid stack buffer overflow from kernel cmdline While the kernel command line is considered trusted in most environments, avoid writing 1 byte past the end of "acpiid" if the "str" argument is maximum length.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f2a5ec7f7b28f9b9cd5fac232ff51019a7f7b9e9 , < a732502bf3bbe859613b6d7b2b0313b11f0474ac (git)
Affected: c513043e0afe6a8ba79d00af358655afabb576d2 , < 0ad8509b468fa1058f4f400a1829f29e4ccc4de8 (git)
Affected: 2ae19ac3ea82a5b87a81c10adbb497c9e58bdd60 , < 9ff52d3af0ef286535749e14e3fe9eceb39a8349 (git)
Affected: b6b26d86c61c441144c72f842f7469bb686e1211 , < 8f80c633cba144f721d38d9380f23d23ab7db10e (git)
Affected: b6b26d86c61c441144c72f842f7469bb686e1211 , < 4bdb0f78bddbfa77d3ab458a21dd9cec495d317a (git)
Affected: b6b26d86c61c441144c72f842f7469bb686e1211 , < 736db11c86f03e717fc4bf771d05efdf10d23acb (git)
Affected: b6b26d86c61c441144c72f842f7469bb686e1211 , < 8503d0fcb1086a7cfe26df67ca4bd9bd9e99bdec (git)
Affected: 5e97dc748d13fad582136ba0c8cec215c7aeeb17 (git)
Affected: 63cd11165e5e0ea2012254c764003eda1f9adb7d (git)
Affected: 5.10.175 , < 5.10.241 (semver)
Affected: 5.15.103 , < 5.15.190 (semver)
Affected: 6.1.16 , < 6.1.149 (semver)
Affected: 5.4.237 , < 5.5 (semver)
Affected: 6.2.3 , < 6.3 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.3
Unaffected: 0 , < 6.3 (semver)
Unaffected: 5.10.241 , ≤ 5.10.* (semver)
Unaffected: 5.15.190 , ≤ 5.15.* (semver)
Unaffected: 6.1.149 , ≤ 6.1.* (semver)
Unaffected: 6.6.103 , ≤ 6.6.* (semver)
Unaffected: 6.12.44 , ≤ 6.12.* (semver)
Unaffected: 6.16.4 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Siemens SIMATIC CN 4100 Affected: 0 , < V5.0 (custom)
guessed Create a notification for this product.
Show details on NVD website
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/amd: Avoid stack buffer overflow from kernel cmdline\n\nWhile the kernel command line is considered trusted in most environments,\navoid writing 1 byte past the end of \"acpiid\" if the \"str\" argument is\nmaximum length."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iommu/amd: evitar el desbordamiento del b\u00fafer de pila desde la l\u00ednea de comandos del kernel. Si bien la l\u00ednea de comandos del kernel se considera confiable en la mayor\u00eda de los entornos, evite escribir 1 byte despu\u00e9s del final de \"acpiid\" si el argumento \"str\" tiene la longitud m\u00e1xima."
          }
        ],
        "id": "CVE-2025-38676",
        "lastModified": "2026-06-17T09:17:38.097",
        "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": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2025-08-26T13:15:32.147",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/0ad8509b468fa1058f4f400a1829f29e4ccc4de8"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/4bdb0f78bddbfa77d3ab458a21dd9cec495d317a"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/736db11c86f03e717fc4bf771d05efdf10d23acb"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/8503d0fcb1086a7cfe26df67ca4bd9bd9e99bdec"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/8f80c633cba144f721d38d9380f23d23ab7db10e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/9ff52d3af0ef286535749e14e3fe9eceb39a8349"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/a732502bf3bbe859613b6d7b2b0313b11f0474ac"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
          },
          {
            "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
            "url": "https://cert-portal.siemens.com/productcert/html/ssa-032379.html"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-787"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-30T01:14:35+00:00",
      "cve": "CVE-2025-38676",
      "id": "CVE-2025-38676",
      "initial_release_date": "2025-08-26T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: iommu/amd: Avoid stack buffer overflow from kernel cmdline",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38676.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

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.


Detection rules are retrieved from Rulezet.


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.