Mozilla Foundation Security Advisory 2025-38

Security Vulnerabilities fixed in Firefox ESR 115.23.1

Announced
May 17, 2025
Impact
critical
Products
Firefox ESR
Fixed in
  • Firefox ESR 115.23.1

#CVE-2025-4918: Out-of-bounds access when resolving Promise objects

Reporter
Edouard Bochin and Tao Yan from Palo Alto Networks working with Trend Micro's Zero Day Initiative
Impact
critical
Description

An attacker was able to perform an out-of-bounds read or write on a JavaScript Promise object.

References

#CVE-2025-4919: Out-of-bounds access when optimizing linear sums

Reporter
Manfred Paul working with Trend Micro's Zero Day Initiative
Impact
critical
Description

An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes.

References
OSZAR »