FKIE_CVE-2026-93236

Vulnerability from fkie_nvd - Published: 2026-09-24 16:17 - Updated: 2026-09-24 16:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: media: meson: vdec: fix NULL pointer deref in vdec_try_fmt_common When VIDIOC_TRY_FMT is called with an unsupported pixel format on the OUTPUT queue, vdec_try_fmt_common() falls back to V4L2_PIX_FMT_MPEG2. However, if a distro has locally patched MPEG2 support out (as it has been broken for some time) the platform format table does not contain MPEG2 so find_format() returns NULL and the subsequent dereference of fmt_out->max_width triggers a NULL pointer dereference. Fix this by falling back to the first format in the platform's format array instead of hardcoding V4L2_PIX_FMT_MPEG2. This is always valid since every platform defines at least one format.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/20aa934ace6917262ff579a73ec018d06a7bad1c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/276f28672bb6d5d5feca78db4219c7b5adf1be26
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3839b6be2279fc4f558723f2c0fbfc9c42070958
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/680a89683197cdfe4e03e6fd7755454c647d39c1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/96dafbae77f50bfe2228bcfedcd8652c5e5f08e8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c620906fb1b2ad75d408ea9d06040d66952d4a31
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d61ba609c3226af3c84268ba606ea06ee63e511b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f2375a308640e401c142c5426d52c3d10e016d25
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/staging/media/meson/vdec/vdec.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "276f28672bb6d5d5feca78db4219c7b5adf1be26",
              "status": "affected",
              "version": "3e7f51bd96077acad6acd7b45668f65b44233c4e",
              "versionType": "git"
            },
            {
              "lessThan": "c620906fb1b2ad75d408ea9d06040d66952d4a31",
              "status": "affected",
              "version": "3e7f51bd96077acad6acd7b45668f65b44233c4e",
              "versionType": "git"
            },
            {
              "lessThan": "3839b6be2279fc4f558723f2c0fbfc9c42070958",
              "status": "affected",
              "version": "3e7f51bd96077acad6acd7b45668f65b44233c4e",
              "versionType": "git"
            },
            {
              "lessThan": "680a89683197cdfe4e03e6fd7755454c647d39c1",
              "status": "affected",
              "version": "3e7f51bd96077acad6acd7b45668f65b44233c4e",
              "versionType": "git"
            },
            {
              "lessThan": "f2375a308640e401c142c5426d52c3d10e016d25",
              "status": "affected",
              "version": "3e7f51bd96077acad6acd7b45668f65b44233c4e",
              "versionType": "git"
            },
            {
              "lessThan": "96dafbae77f50bfe2228bcfedcd8652c5e5f08e8",
              "status": "affected",
              "version": "3e7f51bd96077acad6acd7b45668f65b44233c4e",
              "versionType": "git"
            },
            {
              "lessThan": "d61ba609c3226af3c84268ba606ea06ee63e511b",
              "status": "affected",
              "version": "3e7f51bd96077acad6acd7b45668f65b44233c4e",
              "versionType": "git"
            },
            {
              "lessThan": "20aa934ace6917262ff579a73ec018d06a7bad1c",
              "status": "affected",
              "version": "3e7f51bd96077acad6acd7b45668f65b44233c4e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/staging/media/meson/vdec/vdec.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.3"
            },
            {
              "lessThan": "5.3",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: meson: vdec: fix NULL pointer deref in vdec_try_fmt_common\n\nWhen VIDIOC_TRY_FMT is called with an unsupported pixel format on the\nOUTPUT queue, vdec_try_fmt_common() falls back to V4L2_PIX_FMT_MPEG2.\nHowever, if a distro has locally patched MPEG2 support out (as it has\nbeen broken for some time) the platform format table does not contain\nMPEG2 so find_format() returns NULL and the subsequent dereference of\nfmt_out-\u003emax_width triggers a NULL pointer dereference.\n\nFix this by falling back to the first format in the platform\u0027s format\narray instead of hardcoding V4L2_PIX_FMT_MPEG2. This is always valid\nsince every platform defines at least one format."
    }
  ],
  "id": "CVE-2026-93236",
  "lastModified": "2026-09-24T16:17:19.297",
  "metrics": {},
  "published": "2026-09-24T16:17:19.297",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/20aa934ace6917262ff579a73ec018d06a7bad1c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/276f28672bb6d5d5feca78db4219c7b5adf1be26"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3839b6be2279fc4f558723f2c0fbfc9c42070958"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/680a89683197cdfe4e03e6fd7755454c647d39c1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/96dafbae77f50bfe2228bcfedcd8652c5e5f08e8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c620906fb1b2ad75d408ea9d06040d66952d4a31"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d61ba609c3226af3c84268ba606ea06ee63e511b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f2375a308640e401c142c5426d52c3d10e016d25"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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