CVE-2025-62490 — Use-after-free in js_print_object in QuickJS
In quickjs, in js_print_object, when printing an array, the function first fetches the array length and then loops over it. The issue is, printing a value is not side-effect fre…
Published: 2025-10-16 · CVSS: 8.8 · CVSS 4.0
In quickjs, in js_print_object, when printing an array, the function first fetches the array length and then loops over it. The issue is, printing a value is not side-effect free. An attacker-defined callback could run during js_print_value, during which the array could get resized and len1 become out of bounds. This results in a use-after-free.A second instance occurs in the same function during printing of a map or set objects. The code iterates over ms->records list, but once again, elements could be removed from the list during js_print_value call.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7