IE11 crashes when using custom CSS (via Accessibility settings)

Fixed Issue #110945


Apr 27, 2014
This issue is public.
Found in build #
Fixed in build #
Reported by 1 person

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Steps to reproduce

– start: Promo Info – Why this bug is important?
We have identified that this bug was promoted based on telemetry data and affects following products failure b0e596c4-faa7-b26c-4d46-b79edcf533bc impacts Product

                          MS Apps        
                              ([#42 on curve](https://insights/Report?id=cee3bfdf-c677-4dff-9b69-6967c234d34d&isPublished=true#UniqueID=E8731ECC-E8EC-A5BF-35E5-3F545CE91611))                 [iexplore.exe 11.0.15063.0](http://watson/Failure?FailureSearchText=b0e596c4-faa7-b26c-4d46-b79edcf533bc&MaxRows=100&OSVersion=10.0.15063.0&DeviceFamily=Windows.Desktop&AppScope_ProcessName=iexplore.exe&AppScope_ProcessVersion=11.0.15063.0)                    
                    * indicates that we have shown only top 5 reasons
        -- end: Promo Info --        URL = 


Repro Steps:

  1. Create a .CSS file with the following contents:

@font-face {
font-family: sans-serif;
src: local(‘Verdana’);

  1. Go to Tools -> Internet Options -> General tab. Press “Accessibility” button.
  2. On the “Accessibility” dialog select “Format documents using my style sheet” check box.
  3. Use “Browse…” button to select the custom CSS file created in the step #1.
  4. Press “OK” buttons to confirm the new settings.
  5. Run IE11 again.

The program crashes.

Expected Results:

IE11 uses custom CSS without crash. In case of invalid CSS its contents should be ignored.

Actual Results:


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    Comments and activity

    • Microsoft Edge Team

      Changed Assigned To to “IPBS P.”

      Changed Assigned To from “IPBS P.” to “Bruce M.”

      Changed Assigned To to “Rossen A.”

      Changed Assigned To from “Rossen A.” to “Sergey M.”

      Changed Status to “Confirmed”

      Changed Assigned To from “Sergey M.” to “Sarita G.”

      Changed Status from “Confirmed” to “In code review”

      Changed Assigned To from “Sarita G.” to “IPBS P.”

      Changed Status from “In code review” to “Fixed”

      Changed Assigned To from “IPBS P.” to “Christian F.”

      Changed Steps to Reproduce

      Changed Steps to Reproduce

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