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media: stk1160: fix bounds checking in stk1160_copy_video()

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2024-38621

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-2024-38621

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": "9cb2173e6ea8f2948bd1367c93083a2500fcf08f",
        "lessThan": "f6a392266276730bea893b55d12940e32a25f56a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9cb2173e6ea8f2948bd1367c93083a2500fcf08f",
        "lessThan": "ecf4ddc3aee8ade504c4d36b7b4053ce6093e200",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9cb2173e6ea8f2948bd1367c93083a2500fcf08f",
        "lessThan": "a16775828aaed1c54ff4e6fe83e8e4d5c6a50cb7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9cb2173e6ea8f2948bd1367c93083a2500fcf08f",
        "lessThan": "7532bcec0797adfa08791301c3bcae14141db3bd",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9cb2173e6ea8f2948bd1367c93083a2500fcf08f",
        "lessThan": "b504518a397059e1d55c521ba0ea2b545a6c4b52",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9cb2173e6ea8f2948bd1367c93083a2500fcf08f",
        "lessThan": "d410017a7181cb55e4a5c810b32b75e4416c6808",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9cb2173e6ea8f2948bd1367c93083a2500fcf08f",
        "lessThan": "a08492832cc4cacc24e0612f483c86ca899b9261",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9cb2173e6ea8f2948bd1367c93083a2500fcf08f",
        "lessThan": "faa4364bef2ec0060de381ff028d1d836600a381",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/media/usb/stk1160/stk1160-video.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.7"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.7",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "4.19.316",
        "versionType": "semver",
        "lessThanOrEqual": "4.19.*"
      },
      {
        "status": "unaffected",
        "version": "5.4.278",
        "versionType": "semver",
        "lessThanOrEqual": "5.4.*"
      },
      {
        "status": "unaffected",
        "version": "5.10.219",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.161",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.93",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.33",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.9.4",
        "versionType": "semver",
        "lessThanOrEqual": "6.9.*"
      },
      {
        "status": "unaffected",
        "version": "6.10",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/media/usb/stk1160/stk1160-video.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2024-38621

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#26621 · Revision 1
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Publisher date
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