cve-2024-38621
Vulnerability from cvelistv5
Published
2024-06-21 10:18
Modified
2024-12-19 09:05
Severity ?
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7532bcec0797adfa08791301c3bcae14141db3bd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a08492832cc4cacc24e0612f483c86ca899b9261
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a16775828aaed1c54ff4e6fe83e8e4d5c6a50cb7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b504518a397059e1d55c521ba0ea2b545a6c4b52
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d410017a7181cb55e4a5c810b32b75e4416c6808
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ecf4ddc3aee8ade504c4d36b7b4053ce6093e200
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f6a392266276730bea893b55d12940e32a25f56a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/faa4364bef2ec0060de381ff028d1d836600a381
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/7532bcec0797adfa08791301c3bcae14141db3bd
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a08492832cc4cacc24e0612f483c86ca899b9261
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a16775828aaed1c54ff4e6fe83e8e4d5c6a50cb7
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b504518a397059e1d55c521ba0ea2b545a6c4b52
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d410017a7181cb55e4a5c810b32b75e4416c6808
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ecf4ddc3aee8ade504c4d36b7b4053ce6093e200
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f6a392266276730bea893b55d12940e32a25f56a
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/faa4364bef2ec0060de381ff028d1d836600a381
Impacted products
Vendor Product Version
Linux Linux Version: 3.7
Show details on NVD website

To clipboard 

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}


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