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.
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History
Tue, 21 Oct 2025 09:45:00 +0000
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Quickjs-ng
Quickjs-ng quickjs |
Thu, 16 Oct 2025 18:15:00 +0000
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ssvc
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Thu, 16 Oct 2025 16:00:00 +0000
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Description | 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. | |
Title | Use-after-free in js_print_object in QuickJS | |
Weaknesses | CWE-416 | |
References |
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Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: Google
Published: 2025-10-16T15:51:06.100Z
Updated: 2025-10-16T18:08:20.982Z
Reserved: 2025-10-15T08:47:41.877Z
Link: CVE-2025-62490

Updated: 2025-10-16T18:08:08.581Z

Status : Awaiting Analysis
Published: 2025-10-16T16:15:39.270
Modified: 2025-10-21T19:31:50.020
Link: CVE-2025-62490

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