Predator and CL could not provide any possible suspects.
Using Code Search for the file, "cfx_retain_ptr.h" assigning to the concern owner who might be related.

Suspecting Commit#
https://pdfium.googlesource.com/pdfium.git/+/6bbb6097b7150dcace3e2fd69caff8b73d59647a

@tsepez -- 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 496604:497767.

Detailed report: https://clusterfuzz.com/testcase?key=5131503104425984

Fuzzer: afl_pdfium_fuzzer
Job Type: afl_chrome_asan
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000068
Crash State:
  Get
  CFX_RetainPtr
  GetImage
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=afl_chrome_asan&range=494973:495064
Fixed: https://clusterfuzz.com/revisions?job=afl_chrome_asan&range=496604:497767

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5131503104425984

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 5131503104425984 is verified as fixed, so closing issue as verified.

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