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CVE PROGRAM SOURCE RECORDUnscored

CVE-2024-38621

media: stk1160: fix bounds checking in stk1160_copy_video()

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 9cb2173e6ea8f2948bd1367c93083a2500fcf08f to < f6a392266276730bea893b55d12940e32a25f56aaffected
  • 9cb2173e6ea8f2948bd1367c93083a2500fcf08f to < ecf4ddc3aee8ade504c4d36b7b4053ce6093e200affected
  • 9cb2173e6ea8f2948bd1367c93083a2500fcf08f to < a16775828aaed1c54ff4e6fe83e8e4d5c6a50cb7affected
  • 9cb2173e6ea8f2948bd1367c93083a2500fcf08f to < 7532bcec0797adfa08791301c3bcae14141db3bdaffected
  • 9cb2173e6ea8f2948bd1367c93083a2500fcf08f to < b504518a397059e1d55c521ba0ea2b545a6c4b52affected
  • 9cb2173e6ea8f2948bd1367c93083a2500fcf08f to < d410017a7181cb55e4a5c810b32b75e4416c6808affected
  • 9cb2173e6ea8f2948bd1367c93083a2500fcf08f to < a08492832cc4cacc24e0612f483c86ca899b9261affected
  • 9cb2173e6ea8f2948bd1367c93083a2500fcf08f to < faa4364bef2ec0060de381ff028d1d836600a381affected

Linux Linux

Default version status: affected

  • 3.7affected
  • 0 to < 3.7unaffected
  • 4.19.316 to ≤ 4.19.*unaffected
  • 5.4.278 to ≤ 5.4.*unaffected
  • 5.10.219 to ≤ 5.10.*unaffected
  • 5.15.161 to ≤ 5.15.*unaffected
  • 6.1.93 to ≤ 6.1.*unaffected
  • 6.6.33 to ≤ 6.6.*unaffected
  • 6.9.4 to ≤ 6.9.*unaffected
  • 6.10 to ≤ *unaffected

References