This is a serious security regression. If you are not able to fix this quickly, please revert the change that introduced it.

If this doesn't affect a release branch, or has not been properly classified for severity, please update the Security_Impact or Security_Severity labels, and remove the ReleaseBlock label. To disable this altogether, apply ReleaseBlock-NA.

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

aleventhal@: PTAL? This appears to be a regression from r563344.

ClusterFuzz has detected this issue as fixed in range 574022:574031.

Detailed report: https://clusterfuzz.com/testcase?key=6530321424842752

Fuzzer: inferno_twister_c
Job Type: linux_asan_content_shell_drt
Platform Id: linux

Crash Type: Heap-use-after-free READ 8
Crash Address: 0x61100003fdc0
Crash State:
  blink::AXObjectCacheImpl::GetOrCreate
  blink::AXObjectCacheImpl::GetOrCreate
  blink::AXObjectCacheImpl::HandleAttributeChanged
  
Sanitizer: address (ASAN)

Recommended Security Severity: High

Regressed: https://clusterfuzz.com/revisions?job=linux_asan_content_shell_drt&range=563343:563345
Fixed: https://clusterfuzz.com/revisions?job=linux_asan_content_shell_drt&range=574022:574031

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6530321424842752

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 6530321424842752 is verified as fixed, so closing issue as verified.

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

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