CVE-2025-6424

Description

A use-after-free in FontFaceSet resulted in a potentially exploitable crash. This vulnerability affects Firefox < 140, Firefox ESR < 115.25, and Firefox ESR < 128.12.

Reserved 2025-06-20 | Published 2025-06-24 | Updated 2025-06-24 | Assigner mozilla

Problem types

Use-after-free in FontFaceSet

Product status

Any version before 140
affected

Any version before 115.25
affected

Any version before 128.12
affected

Credits

LJP and HexRabbit (DEVCORE Research Team)

References

bugzilla.mozilla.org/show_bug.cgi?id=1966423

www.mozilla.org/security/advisories/mfsa2025-51/

www.mozilla.org/security/advisories/mfsa2025-52/

www.mozilla.org/security/advisories/mfsa2025-53/

cve.org (CVE-2025-6424)

nvd.nist.gov (CVE-2025-6424)

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