Find it, CL and Code Search did not provide any possible suspects.
Assigning to the concern owner who previously worked on similar issues.

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

This is part of XFA, which is disabled in all branches of Chrome.

ClusterFuzz has detected this issue as fixed in range 442317:442377.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6380748027461632

Fuzzer: afl_pdf_codec_tiff_fuzzer
Job Type: afl_chrome_asan
Platform Id: linux

Crash Type: UNKNOWN
Crash Address: 0x03e9000041f9
Crash State:
  CCodec_TiffModule::LoadFrameInfo
  CCodec_ProgressiveDecoder::DetectImageType
  CCodec_ProgressiveDecoder::LoadImageInfo
  
Sanitizer: address (ASAN)

Regressed: https://cluster-fuzz.appspot.com/revisions?job=afl_chrome_asan&range=422882:422996
Fixed: https://cluster-fuzz.appspot.com/revisions?job=afl_chrome_asan&range=442317:442377

Minimized Testcase (0.10 Kb): https://cluster-fuzz.appspot.com/download/AMIfv954UG8VAt73EyTkOdQ8KUqpaELhvwbr_CdFL6oQdqQZxfwlF7y0IUxg8HrBCAe8dKvL-v0w7Ziw05xmBYiC5bqqTFR3f8-06LfPyXN_jBJM3w22L6loVn889EEu7w7Emn_gqCgknavcUassC6Agdnn03wdbvA?testcase_id=6380748027461632

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md 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 6380748027461632 is verified as fixed, so closing issue.

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