Vulnerability-Lookup

CVE-2025-71140 (GCVE-0-2025-71140)

Vulnerability from cvelistv5 – Published: 2026-01-14 15:07 – Updated: 2026-01-14 15:07

Title

media: mediatek: vcodec: Use spinlock for context list protection lock

Summary

In the Linux kernel, the following vulnerability has been resolved: media: mediatek: vcodec: Use spinlock for context list protection lock Previously a mutex was added to protect the encoder and decoder context lists from unexpected changes originating from the SCP IP block, causing the context pointer to go invalid, resulting in a NULL pointer dereference in the IPI handler. Turns out on the MT8173, the VPU IPI handler is called from hard IRQ context. This causes a big warning from the scheduler. This was first reported downstream on the ChromeOS kernels, but is also reproducible on mainline using Fluster with the FFmpeg v4l2m2m decoders. Even though the actual capture format is not supported, the affected code paths are triggered. Since this lock just protects the context list and operations on it are very fast, it should be OK to switch to a spinlock.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/2c1ea6214827041f5…
	https://git.kernel.org/stable/c/b92c19675f632a41a…
	https://git.kernel.org/stable/c/3e858938b0e659f6e…
	https://git.kernel.org/stable/c/a5844227e0f030d2a…

Impacted products

Vendor

Product

Version

Linux

Affected: 0a2dc707aa42214f9c4827bd57e344e29a0841d6 , < 2c1ea6214827041f548279c9eda341eda0cc8351 (git)
Affected: 6467cda18c9f9b5f2f9a0aa1e2861c653e41f382 , < b92c19675f632a41af1222027a231bc2b7efa7ed (git)
Affected: 6467cda18c9f9b5f2f9a0aa1e2861c653e41f382 , < 3e858938b0e659f6ec9ddcf853a87f1c5c3f44e1 (git)
Affected: 6467cda18c9f9b5f2f9a0aa1e2861c653e41f382 , < a5844227e0f030d2af2d85d4aed10c5eca6ca176 (git)
Affected: 23aaf824121055ba81b55f75444355bd83c8eb38 (git)
Affected: 41671f0c0182b2bae74ca7e3b0f155559e3e2fc5 (git)
Affected: 51c84a8aac6e3b59af2b0e92ba63cabe2e641a2d (git)

Linux

Affected: 6.9
Unaffected: 0 , < 6.9 (semver)
Unaffected: 6.6.120 , ≤ 6.6.* (semver)
Unaffected: 6.12.64 , ≤ 6.12.* (semver)
Unaffected: 6.18.4 , ≤ 6.18.* (semver)
Unaffected: 6.19-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_fw_vpu.c",
            "drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.c",
            "drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.h",
            "drivers/media/platform/mediatek/vcodec/decoder/vdec_vpu_if.c",
            "drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_drv.c",
            "drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_drv.h",
            "drivers/media/platform/mediatek/vcodec/encoder/venc_vpu_if.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2c1ea6214827041f548279c9eda341eda0cc8351",
              "status": "affected",
              "version": "0a2dc707aa42214f9c4827bd57e344e29a0841d6",
              "versionType": "git"
            },
            {
              "lessThan": "b92c19675f632a41af1222027a231bc2b7efa7ed",
              "status": "affected",
              "version": "6467cda18c9f9b5f2f9a0aa1e2861c653e41f382",
              "versionType": "git"
            },
            {
              "lessThan": "3e858938b0e659f6ec9ddcf853a87f1c5c3f44e1",
              "status": "affected",
              "version": "6467cda18c9f9b5f2f9a0aa1e2861c653e41f382",
              "versionType": "git"
            },
            {
              "lessThan": "a5844227e0f030d2af2d85d4aed10c5eca6ca176",
              "status": "affected",
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              "versionType": "git"
            },
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              "version": "23aaf824121055ba81b55f75444355bd83c8eb38",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "41671f0c0182b2bae74ca7e3b0f155559e3e2fc5",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "51c84a8aac6e3b59af2b0e92ba63cabe2e641a2d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_fw_vpu.c",
            "drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.c",
            "drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.h",
            "drivers/media/platform/mediatek/vcodec/decoder/vdec_vpu_if.c",
            "drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_drv.c",
            "drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_drv.h",
            "drivers/media/platform/mediatek/vcodec/encoder/venc_vpu_if.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.9"
            },
            {
              "lessThan": "6.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.120",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.64",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.120",
                  "versionStartIncluding": "6.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.64",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.4",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19-rc1",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.8.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.8.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: mediatek: vcodec: Use spinlock for context list protection lock\n\nPreviously a mutex was added to protect the encoder and decoder context\nlists from unexpected changes originating from the SCP IP block, causing\nthe context pointer to go invalid, resulting in a NULL pointer\ndereference in the IPI handler.\n\nTurns out on the MT8173, the VPU IPI handler is called from hard IRQ\ncontext. This causes a big warning from the scheduler. This was first\nreported downstream on the ChromeOS kernels, but is also reproducible\non mainline using Fluster with the FFmpeg v4l2m2m decoders. Even though\nthe actual capture format is not supported, the affected code paths\nare triggered.\n\nSince this lock just protects the context list and operations on it are\nvery fast, it should be OK to switch to a spinlock."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-14T15:07:53.581Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2c1ea6214827041f548279c9eda341eda0cc8351"
        },
        {
          "url": "https://git.kernel.org/stable/c/b92c19675f632a41af1222027a231bc2b7efa7ed"
        },
        {
          "url": "https://git.kernel.org/stable/c/3e858938b0e659f6ec9ddcf853a87f1c5c3f44e1"
        },
        {
          "url": "https://git.kernel.org/stable/c/a5844227e0f030d2af2d85d4aed10c5eca6ca176"
        }
      ],
      "title": "media: mediatek: vcodec: Use spinlock for context list protection lock",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-71140",
    "datePublished": "2026-01-14T15:07:53.581Z",
    "dateReserved": "2026-01-13T15:30:19.660Z",
    "dateUpdated": "2026-01-14T15:07:53.581Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-71140\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-01-14T15:16:03.793\",\"lastModified\":\"2026-01-14T16:25:12.057\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmedia: mediatek: vcodec: Use spinlock for context list protection lock\\n\\nPreviously a mutex was added to protect the encoder and decoder context\\nlists from unexpected changes originating from the SCP IP block, causing\\nthe context pointer to go invalid, resulting in a NULL pointer\\ndereference in the IPI handler.\\n\\nTurns out on the MT8173, the VPU IPI handler is called from hard IRQ\\ncontext. This causes a big warning from the scheduler. This was first\\nreported downstream on the ChromeOS kernels, but is also reproducible\\non mainline using Fluster with the FFmpeg v4l2m2m decoders. Even though\\nthe actual capture format is not supported, the affected code paths\\nare triggered.\\n\\nSince this lock just protects the context list and operations on it are\\nvery fast, it should be OK to switch to a spinlock.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2c1ea6214827041f548279c9eda341eda0cc8351\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3e858938b0e659f6ec9ddcf853a87f1c5c3f44e1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a5844227e0f030d2af2d85d4aed10c5eca6ca176\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b92c19675f632a41af1222027a231bc2b7efa7ed\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}

GHSA-FMMJ-6V74-3CM2

Vulnerability from github – Published: 2026-01-14 15:33 – Updated: 2026-01-14 15:33

Details

In the Linux kernel, the following vulnerability has been resolved:

media: mediatek: vcodec: Use spinlock for context list protection lock

Previously a mutex was added to protect the encoder and decoder context lists from unexpected changes originating from the SCP IP block, causing the context pointer to go invalid, resulting in a NULL pointer dereference in the IPI handler.

Turns out on the MT8173, the VPU IPI handler is called from hard IRQ context. This causes a big warning from the scheduler. This was first reported downstream on the ChromeOS kernels, but is also reproducible on mainline using Fluster with the FFmpeg v4l2m2m decoders. Even though the actual capture format is not supported, the affected code paths are triggered.

Since this lock just protects the context list and operations on it are very fast, it should be OK to switch to a spinlock.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2025-71140"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-14T15:16:03Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: mediatek: vcodec: Use spinlock for context list protection lock\n\nPreviously a mutex was added to protect the encoder and decoder context\nlists from unexpected changes originating from the SCP IP block, causing\nthe context pointer to go invalid, resulting in a NULL pointer\ndereference in the IPI handler.\n\nTurns out on the MT8173, the VPU IPI handler is called from hard IRQ\ncontext. This causes a big warning from the scheduler. This was first\nreported downstream on the ChromeOS kernels, but is also reproducible\non mainline using Fluster with the FFmpeg v4l2m2m decoders. Even though\nthe actual capture format is not supported, the affected code paths\nare triggered.\n\nSince this lock just protects the context list and operations on it are\nvery fast, it should be OK to switch to a spinlock.",
  "id": "GHSA-fmmj-6v74-3cm2",
  "modified": "2026-01-14T15:33:02Z",
  "published": "2026-01-14T15:33:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-71140"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2c1ea6214827041f548279c9eda341eda0cc8351"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3e858938b0e659f6ec9ddcf853a87f1c5c3f44e1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a5844227e0f030d2af2d85d4aed10c5eca6ca176"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b92c19675f632a41af1222027a231bc2b7efa7ed"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

FKIE_CVE-2025-71140

Vulnerability from fkie_nvd - Published: 2026-01-14 15:16 - Updated: 2026-01-14 16:25

Severity ?

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2c1ea6214827041f548279c9eda341eda0cc8351
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3e858938b0e659f6ec9ddcf853a87f1c5c3f44e1
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a5844227e0f030d2af2d85d4aed10c5eca6ca176
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b92c19675f632a41af1222027a231bc2b7efa7ed

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: mediatek: vcodec: Use spinlock for context list protection lock\n\nPreviously a mutex was added to protect the encoder and decoder context\nlists from unexpected changes originating from the SCP IP block, causing\nthe context pointer to go invalid, resulting in a NULL pointer\ndereference in the IPI handler.\n\nTurns out on the MT8173, the VPU IPI handler is called from hard IRQ\ncontext. This causes a big warning from the scheduler. This was first\nreported downstream on the ChromeOS kernels, but is also reproducible\non mainline using Fluster with the FFmpeg v4l2m2m decoders. Even though\nthe actual capture format is not supported, the affected code paths\nare triggered.\n\nSince this lock just protects the context list and operations on it are\nvery fast, it should be OK to switch to a spinlock."
    }
  ],
  "id": "CVE-2025-71140",
  "lastModified": "2026-01-14T16:25:12.057",
  "metrics": {},
  "published": "2026-01-14T15:16:03.793",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2c1ea6214827041f548279c9eda341eda0cc8351"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3e858938b0e659f6ec9ddcf853a87f1c5c3f44e1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a5844227e0f030d2af2d85d4aed10c5eca6ca176"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b92c19675f632a41af1222027a231bc2b7efa7ed"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

CVE-2025-71140 (GCVE-0-2025-71140)

GHSA-FMMJ-6V74-3CM2

FKIE_CVE-2025-71140

Tags

Sightings

Nomenclature