CVE-2025-8027 — JavaScript engine only wrote partial return value to stack
On 64-bit platforms IonMonkey-JIT only wrote 32 bits of the 64-bit return value space on the stack. Baseline-JIT, however, read the entire 64 bits. This vulnerability was fixed …
Published: 2025-07-22 · CVSS: 6.5 · CVSS 3.1
On 64-bit platforms IonMonkey-JIT only wrote 32 bits of the 64-bit return value space on the stack. Baseline-JIT, however, read the entire 64 bits. This vulnerability was fixed in Firefox 141, Firefox ESR 115.26, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7