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media: vicodec: fix out-of-bounds write in FWHT encoder

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: media: vicodec: fix out-of-bounds write in FWHT encoder vidioc_s_fmt_vid_out() sizes the encoder CAPTURE buffer from the compressed descriptor pixfmt_fwht, whose sizeimage_mult is 3: coded_w * coded_h * 3 + sizeof(struct fwht_cframe_hdr). fwht_encode_frame() encodes one plane per component, and an incompressible plane takes the FWHT_FRAME_UNENCODED path in encode_plane(), copying the plane verbatim. For a 4-component pixel format all four planes are full resolution (width_div == height_div == 1), so a frame that forces every plane through the unencoded fallback writes sizeof(struct fwht_cframe_hdr) + 4 * coded_w * coded_h bytes, overrunning the plane by coded_w * coded_h, which can result in corruption of adjacent kernel heap memory. Bump pixfmt_fwht.sizeimage_mult from 3 to 4, matching the largest components_num among the supported raw formats, so the capture buffer is always large enough for the unencoded fallback.

Announced Source revision 1
Original source ↗

CVE-2026-89724

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-89724

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "16ecf6dff97ce0194a7126e26159492668d47a7e",
        "lessThan": "f7ae26c100a6c26c2a166d2c41e73188067b36bd",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "16ecf6dff97ce0194a7126e26159492668d47a7e",
        "lessThan": "6ea647e76c44387d5c1c635df4604c2154d9060e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "16ecf6dff97ce0194a7126e26159492668d47a7e",
        "lessThan": "d40838a63f2bd6a3df0a6cdd8ff1d5c6366e8fff",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "16ecf6dff97ce0194a7126e26159492668d47a7e",
        "lessThan": "e21cccc29b840930cd9dcfdf1139658063a681af",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "16ecf6dff97ce0194a7126e26159492668d47a7e",
        "lessThan": "84cfebf7f4229d748cca8eb9c4e1f1c4099d3ab7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "16ecf6dff97ce0194a7126e26159492668d47a7e",
        "lessThan": "8c14472431e27f13661d0db9d837156eaced0ecb",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "16ecf6dff97ce0194a7126e26159492668d47a7e",
        "lessThan": "b95315ffc66b39856396c1043618bb4e4d5785ba",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "16ecf6dff97ce0194a7126e26159492668d47a7e",
        "lessThan": "cf4500ebf6fb57bf4ab83c3dd349a40257dbe2a9",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/media/test-drivers/vicodec/vicodec-core.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.0"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.0",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.270",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.109",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.50",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.4",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/media/test-drivers/vicodec/vicodec-core.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-89724

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#35201 · Revision 1
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Publisher date
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