Predator and CL did not provide any possible suspects.
Using Code Search for the file, "Context.cpp" assigning to concern owner who might be related to similar kind of files.

@oetuaho -- Could you please look into the issue, kindly re-assign if this is not related to your changes.
Thank You.

ClusterFuzz has detected this issue as fixed in range 497661:497666.

Detailed report: https://clusterfuzz.com/testcase?key=5547882181820416

Fuzzer: inferno_twister
Job Type: linux_ubsan_chrome
Platform Id: linux

Crash Type: Integer-overflow
Crash Address: 
Crash State:
  es2::Context::applyScissor
  es2::Context::applyRenderTarget
  es2::Context::clear
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_chrome&range=463855:463874
Fixed: https://clusterfuzz.com/revisions?job=linux_ubsan_chrome&range=497661:497666

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5547882181820416

See https://github.com/google/clusterfuzz-tools for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.

ClusterFuzz testcase 5547882181820416 is verified as fixed, so closing issue as verified.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.