Unable to find the possible suspect using Find it and CL.
Using Code Search for the file, "global-handles.cc" assigning to the concern owner.

Suspecting the following CL --
https://chromium.googlesource.com/v8/v8/+/566c825d4a7760351862b8bcfd59303442c1d635

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

ClusterFuzz has detected this issue as fixed in range 434929:434986.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6340411925987328

Fuzzer: lcamtuf_cross_fuzz
Job Type: linux_lsan_chrome_mp
Platform Id: linux

Crash Type: UNKNOWN READ
Crash Address: 0x000000000000
Crash State:
  MakeWeak
  v8::internal::GlobalHandles::MakeWeak
  SetWeak
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=linux_lsan_chrome_mp&range=434385:434426
Fixed: https://cluster-fuzz.appspot.com/revisions?job=linux_lsan_chrome_mp&range=434929:434986

Unminimized Testcase: https://cluster-fuzz.appspot.com/download/AMIfv97yxFe6X652vL4pKzDEffFwBHlE5L_pQvRcNKviCgFmf21KLef09bPvykl7oEhHOrQH7_qd9E4d6OmLs-LMqnvH4I8wVuZzHAFuVRi21p1NRiIjLaEE4KMISWyhYi5K4cfms7BthYJr14tzLlE3HRXZaLO0pqQn_IGH3syBOuCgs0vKW7g?testcase_id=6340411925987328


See https://dev.chromium.org/Home/chromium-security/bugs/reproducing-clusterfuzz-bugs for more information.

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