In Video HAL, there is a possible escalation of privilege due to a missing bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11375674; Issue ID: MSV-9571.

cve CVE-2026-20521 2 sources, 2 claims · Watch

NVD writes:
In Video HAL, there is a possible escalation of privilege due to a missing bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11375674; Issue ID: MSV-9571. the claim

What it is to other things

In words only, so not counted until a person confirms one:

affectsmediatek_inc/mediatek_chipset
NVD says “MediaTek, Inc. · MediaTek chipset”
made_bymediatek_inc
NVD says “MediaTek, Inc.”

What each source says

PropertySourceSaidMeans here
Cvss
cvss
NVD8.4
receipt
Source
NVD
Its words
8.4
Read by
field:cve.metrics.cvssMetricV31[].cvssData.baseScore
Said since
2026-10-05 12:23 UTC
Last answered
2026-10-05 12:24 UTC
Original
open at the source
2026-10-05 12:23 UTC8.4
2026-10-05 06:21 UTC—
What the source handed over
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}
—
Cwe
cwe
GitHub advisoriesCWE-121
receipt
Source
GitHub advisories
Its words
CWE-121
Read by
field:cwes[].cwe_id
Said since
2026-10-05 06:17 UTC
Last answered
2026-10-05 12:22 UTC
Original
open at the source
What the source handed over
{
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}
—
Product
product
NVDMediaTek chipset
receipt
Source
NVD
Its words
MediaTek chipset
Read by
field:cve.affected[].affectedData[].product
Said since
2026-10-05 06:21 UTC
Last answered
2026-10-05 12:24 UTC
Original
open at the source
What the source handed over
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—
Severity
severity
GitHub advisoriesunknown
receipt
Source
GitHub advisories
Its words
unknown
Read by
field:severity
Said since
2026-10-05 06:17 UTC
Last answered
2026-10-05 12:22 UTC
Original
open at the source
What the source handed over
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—
Status
status
NVDReceived
receipt
Source
NVD
Its words
Received
Read by
field:cve.vulnStatus
Said since
2026-10-05 06:21 UTC
Last answered
2026-10-05 12:24 UTC
Original
open at the source
What the source handed over
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              },
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    ],
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      {
        "lang": "en",
        "value": "In Video HAL, there is a possible escalation of privilege due to a missing bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11375674; Issue ID: MSV-9571."
      }
    ],
    "id": "CVE-2026-20521",
    "lastModified": "2026-10-05T11:16:48.820",
    "metrics": {
      "cvssMetricV31": [
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      "ssvcV203": [
        {
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            ],
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          }
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      ]
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    "published": "2026-10-05T02:16:50.660",
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      {
        "source": "security@mediatek.com",
        "url": "https://www.mediatek.com/product-security-bulletin/October-2026"
      }
    ],
    "sourceIdentifier": "security@mediatek.com",
    "vulnStatus": "Received",
    "weaknesses": [
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          {
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        "source": "security@mediatek.com",
        "type": "Secondary"
      }
    ]
  }
}
—
Vendor
vendor
NVDMediaTek, Inc.
receipt
Source
NVD
Its words
MediaTek, Inc.
Read by
field:cve.affected[].affectedData[].vendor
Said since
2026-10-05 06:21 UTC
Last answered
2026-10-05 12:24 UTC
Original
open at the source
What the source handed over
{
  "cve": {
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      {
        "affectedData": [
          {
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            "vendor": "MediaTek, Inc.",
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              },
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                "status": "affected",
                "version": "MT6769"
              },
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                "version": "MT6781"
              },
              {
                "status": "affected",
                "version": "MT6789"
              },
              {
                "status": "affected",
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              },
              {
                "status": "affected",
                "version": "MT6835"
              },
              {
                "status": "affected",
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              {
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                "status": "affected",
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              },
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              {
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              },
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              },
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      }
    ],
    "sourceIdentifier": "security@mediatek.com",
    "vulnStatus": "Received",
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          {
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          }
        ],
        "source": "security@mediatek.com",
        "type": "Secondary"
      }
    ]
  }
}
—

vulnerability

In Video HAL, there is a possible escalation of privilege due to a missing bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11375674; Issue ID: MSV-9571.
zetlyn/cve-nvd · 2026-10-05
cvss 8.4 product MediaTek chipset status Received vendor MediaTek, Inc. source
In Video HAL, there is a possible escalation of privilege due to a missing bounds check. This...
zetlyn/cve-ghsa · 2026-10-05
cwe CWE-121 severity unknown source