CVE-2024-38621 (GCVE-0-2024-38621)

Vulnerability from cvelistv5 – Published: 2024-06-21 10:18 – Updated: 2026-10-15 00:43
VLAI
Title
media: stk1160: fix bounds checking in stk1160_copy_video()
Summary
In the Linux kernel, the following vulnerability has been resolved: media: stk1160: fix bounds checking in stk1160_copy_video() The subtract in this condition is reversed. The ->length is the length of the buffer. The ->bytesused is how many bytes we have copied thus far. When the condition is reversed that means the result of the subtraction is always negative but since it's unsigned then the result is a very high positive value. That means the overflow check is never true. Additionally, the ->bytesused doesn't actually work for this purpose because we're not writing to "buf->mem + buf->bytesused". Instead, the math to calculate the destination where we are writing is a bit involved. You calculate the number of full lines already written, multiply by two, skip a line if necessary so that we start on an odd numbered line, and add the offset into the line. To fix this buffer overflow, just take the actual destination where we are writing, if the offset is already out of bounds print an error and return. Otherwise, write up to buf->length bytes.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 17:09 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6641 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 9cb2173e6ea8f2948bd1367c93083a2500fcf08f , < f6a392266276730bea893b55d12940e32a25f56a (git)
Affected: 9cb2173e6ea8f2948bd1367c93083a2500fcf08f , < ecf4ddc3aee8ade504c4d36b7b4053ce6093e200 (git)
Affected: 9cb2173e6ea8f2948bd1367c93083a2500fcf08f , < a16775828aaed1c54ff4e6fe83e8e4d5c6a50cb7 (git)
Affected: 9cb2173e6ea8f2948bd1367c93083a2500fcf08f , < 7532bcec0797adfa08791301c3bcae14141db3bd (git)
Affected: 9cb2173e6ea8f2948bd1367c93083a2500fcf08f , < b504518a397059e1d55c521ba0ea2b545a6c4b52 (git)
Affected: 9cb2173e6ea8f2948bd1367c93083a2500fcf08f , < d410017a7181cb55e4a5c810b32b75e4416c6808 (git)
Affected: 9cb2173e6ea8f2948bd1367c93083a2500fcf08f , < a08492832cc4cacc24e0612f483c86ca899b9261 (git)
Affected: 9cb2173e6ea8f2948bd1367c93083a2500fcf08f , < faa4364bef2ec0060de381ff028d1d836600a381 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.7
Unaffected: 0 , < 3.7 (semver)
Unaffected: 4.19.316 , ≤ 4.19.* (semver)
Unaffected: 5.4.278 , ≤ 5.4.* (semver)
Unaffected: 5.10.219 , ≤ 5.10.* (semver)
Unaffected: 5.15.161 , ≤ 5.15.* (semver)
Unaffected: 6.1.93 , ≤ 6.1.* (semver)
Unaffected: 6.6.33 , ≤ 6.6.* (semver)
Unaffected: 6.9.4 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.0 , < V3.1.5 (custom)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.0 , < V3.1.5 (custom)
guessed Create a notification for this product.
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.0 , < V3.1.5 (custom)
guessed Create a notification for this product.
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                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.10",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "4.19.316",
                      "versionStartIncluding": "3.7",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.4.278",
                      "versionStartIncluding": "3.7",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.219",
                      "versionStartIncluding": "3.7",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.161",
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                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.93",
                      "versionStartIncluding": "3.7",
                      "vulnerable": true
                    },
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                      "vulnerable": true
                    },
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                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.9.4",
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                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: stk1160: fix bounds checking in stk1160_copy_video()\n\nThe subtract in this condition is reversed.  The -\u003elength is the length\nof the buffer.  The -\u003ebytesused is how many bytes we have copied thus\nfar.  When the condition is reversed that means the result of the\nsubtraction is always negative but since it\u0027s unsigned then the result\nis a very high positive value.  That means the overflow check is never\ntrue.\n\nAdditionally, the -\u003ebytesused doesn\u0027t actually work for this purpose\nbecause we\u0027re not writing to \"buf-\u003emem + buf-\u003ebytesused\".  Instead, the\nmath to calculate the destination where we are writing is a bit\ninvolved.  You calculate the number of full lines already written,\nmultiply by two, skip a line if necessary so that we start on an odd\nnumbered line, and add the offset into the line.\n\nTo fix this buffer overflow, just take the actual destination where we\nare writing, if the offset is already out of bounds print an error and\nreturn.  Otherwise, write up to buf-\u003elength bytes."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-11T20:20:19.210Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/f6a392266276730bea893b55d12940e32a25f56a"
            },
            {
              "url": "https://git.kernel.org/stable/c/ecf4ddc3aee8ade504c4d36b7b4053ce6093e200"
            },
            {
              "url": "https://git.kernel.org/stable/c/a16775828aaed1c54ff4e6fe83e8e4d5c6a50cb7"
            },
            {
              "url": "https://git.kernel.org/stable/c/7532bcec0797adfa08791301c3bcae14141db3bd"
            },
            {
              "url": "https://git.kernel.org/stable/c/b504518a397059e1d55c521ba0ea2b545a6c4b52"
            },
            {
              "url": "https://git.kernel.org/stable/c/d410017a7181cb55e4a5c810b32b75e4416c6808"
            },
            {
              "url": "https://git.kernel.org/stable/c/a08492832cc4cacc24e0612f483c86ca899b9261"
            },
            {
              "url": "https://git.kernel.org/stable/c/faa4364bef2ec0060de381ff028d1d836600a381"
            }
          ],
          "title": "media: stk1160: fix bounds checking in stk1160_copy_video()",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-38621",
        "datePublished": "2024-06-21T10:18:14.955Z",
        "dateReserved": "2024-06-18T19:36:34.945Z",
        "dateUpdated": "2026-10-15T00:43:48.837Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.
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.

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    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.