Nothing in the regression range seems relevant.

Pretty sure this is just a dupe of  issue 738944 ; where CF is using internal methods only exposed to the layout test harness:

      internals.setMediaElementNetworkState(audio, 6490321773201879598313901593953); // NetworkStateDecodeError.

ClusterFuzz has detected this issue as fixed in range 510178:510268.

Detailed report: https://clusterfuzz.com/testcase?key=6423966687428608

Fuzzer: inferno_layout_test_unmodified
Job Type: windows_asan_content_shell
Platform Id: windows

Crash Type: Heap-use-after-free READ 4
Crash Address: 0x1a8250a0
Crash State:
  blink::HTMLMediaElement::AudioSourceProviderImpl::Wrap
  blink::HTMLMediaElement::StartPlayerLoad
  blink::HTMLMediaElement::LoadResource
  
Sanitizer: address (ASAN)

Recommended Security Severity: High

Regressed: https://clusterfuzz.com/revisions?job=windows_asan_content_shell&range=433514:433527
Fixed: https://clusterfuzz.com/revisions?job=windows_asan_content_shell&range=510178:510268

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6423966687428608

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.

This bug has been closed for more than 14 weeks. Removing security view restrictions.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot