CVE-2025-62491 (GCVE-0-2025-62491)
Vulnerability from cvelistv5
Published
2025-10-16 15:51
Modified
2025-10-16 18:04
Severity ?
8.8 (High) - CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L
CWE
Summary
A Use-After-Free (UAF) vulnerability exists in the QuickJS engine's standard library when iterating over the global list of unhandled rejected promises (ts->rejected_promise_list). * The function js_std_promise_rejection_check attempts to iterate over the rejected_promise_list to report unhandled rejections using a standard list loop. * The reason for a promise rejection is processed inside the loop, including calling js_std_dump_error1(ctx, rp->reason). * If the promise rejection reason is an Error object that defines a custom property getter (e.g., via Object.defineProperty), this getter is executed during the error dumping process. * The malicious custom getter can execute JavaScript code that calls catch() on the same rejected promise being processed. * Calling catch() internally triggers js_std_promise_rejection_tracker, which then removes and frees the current promise entry (JSRejectedPromiseEntry) from the rejected_promise_list. * Since the list iteration continues using the now-freed memory pointer (el), the subsequent loop access results in a Use-After-Free condition.
References
cve-coordination@google.comhttps://bellard.org/quickjs/Changelog
cve-coordination@google.comhttps://issuetracker.google.com/434195203
Impacted products
Vendor Product Version
QuickJS QuickJS Version: 2025-04-26
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