Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 9cb2173e6ea8f2948bd1367c93083a2500fcf08f before f6a392266276730bea893b55d12940e32a25f56a; affected 9cb2173e6ea8f2948bd1367c93083a2500fcf08f before ecf4ddc3aee8ade504c4d36b7b4053ce6093e200; affected 9cb2173e6ea8f2948bd1367c93083a2500fcf08f before a16775828aaed1c54ff4e6fe83e8e4d5c6a50cb7; affected 9cb2173e6ea8f2948bd1367c93083a2500fcf08f before 7532bcec0797adfa08791301c3bcae14141db3bd; affected 9cb2173e6ea8f2948bd1367c93083a2500fcf08f before b504518a397059e1d55c521ba0ea2b545a6c4b52; affected 9cb2173e6ea8f2948bd1367c93083a2500fcf08f before d410017a7181cb55e4a5c810b32b75e4416c6808; affected 9cb2173e6ea8f2948bd1367c93083a2500fcf08f before a08492832cc4cacc24e0612f483c86ca899b9261; affected 9cb2173e6ea8f2948bd1367c93083a2500fcf08f before faa4364bef2ec0060de381ff028d1d836600a381 |
| Linux / Linux | affected 3.7; unaffected 0 before 3.7; unaffected 4.19.316 through 4.19.*; unaffected 5.4.278 through 5.4.*; unaffected 5.10.219 through 5.10.*; unaffected 5.15.161 through 5.15.*; unaffected 6.1.93 through 6.1.*; unaffected 6.6.33 through 6.6.*; unaffected 6.9.4 through 6.9.*; unaffected 6.10 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/f6a392266276730bea893b55d12940e32a25f56a
- https://git.kernel.org/stable/c/ecf4ddc3aee8ade504c4d36b7b4053ce6093e200
- https://git.kernel.org/stable/c/a16775828aaed1c54ff4e6fe83e8e4d5c6a50cb7
- https://git.kernel.org/stable/c/7532bcec0797adfa08791301c3bcae14141db3bd
- https://git.kernel.org/stable/c/b504518a397059e1d55c521ba0ea2b545a6c4b52
- https://git.kernel.org/stable/c/d410017a7181cb55e4a5c810b32b75e4416c6808
- https://git.kernel.org/stable/c/a08492832cc4cacc24e0612f483c86ca899b9261
- https://git.kernel.org/stable/c/faa4364bef2ec0060de381ff028d1d836600a381
ADP enrichment
No English description supplied.
- https://git.kernel.org/stable/c/f6a392266276730bea893b55d12940e32a25f56a
- https://git.kernel.org/stable/c/ecf4ddc3aee8ade504c4d36b7b4053ce6093e200
- https://git.kernel.org/stable/c/a16775828aaed1c54ff4e6fe83e8e4d5c6a50cb7
- https://git.kernel.org/stable/c/7532bcec0797adfa08791301c3bcae14141db3bd
- https://git.kernel.org/stable/c/b504518a397059e1d55c521ba0ea2b545a6c4b52
- https://git.kernel.org/stable/c/d410017a7181cb55e4a5c810b32b75e4416c6808
- https://git.kernel.org/stable/c/a08492832cc4cacc24e0612f483c86ca899b9261
- https://git.kernel.org/stable/c/faa4364bef2ec0060de381ff028d1d836600a381
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
No English description supplied.
No references supplied.
No English description supplied.