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CVE-2025-1934: It was possible to interrupt the processing of a RegExp bailout and run additional JavaScript, potentially triggering garbage collection when the...

Description

It was possible to interrupt the processing of a RegExp bailout and run additional JavaScript, potentially triggering garbage collection when the engine was not expecting it. This vulnerability affects Firefox < 136 and Firefox ESR < 128.8.

Classification

CVE ID: CVE-2025-1934

Problem Types

Unexpected GC during RegExp bailout processing

Affected Products

Vendor: Mozilla, Mozilla

Product: Firefox, Firefox ESR

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.16% (probability of being exploited)

EPSS Percentile: 33.59% (scored less or equal to compared to others)

EPSS Date: 2025-04-02 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-1934
https://bugzilla.mozilla.org/show_bug.cgi?id=1942881
https://www.mozilla.org/security/advisories/mfsa2025-14/
https://www.mozilla.org/security/advisories/mfsa2025-16/

Timeline