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Tom’s Hardware
Tom’s Hardware
Technology
Kunal Khullar

After a year, Firefox finally stops crashing on Intel's Raptor Lake CPUs — Mozilla releases new version patch critical flaw on Intel 13th-gen and 14th-gen CPUs

Intel Corporation Mozilla
Raptor Lake CPU.

Mozilla has successfully addressed a critical bug related to Firefox that caused the web browser to crash on desktop systems powered by Intel’s Raptor Lake CPUs. With the latest stable release of Firefox version 151.01, the company has managed to patch the issue that has been under investigation for more than a year.

Mozilla engineers initially zeroed in on failures in a zlib-rs compression routine where certain dist values appeared incorrect, resulting in index out-of-bounds crashes. However, the root cause was tied to Intel’s Raptor Lake CPU instructions, specifically RPL050 and RPL060, which sometimes caused the CPU cores to read incorrect or outdated data.

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