| Título | quickjs-ng quickjs v0.11.0 Heap-based Buffer Overflow |
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| Descrição | A heap-buffer-overflow (out-of-bounds access) can be triggered in QuickJS-NG in js_typed_array_sort when a user-supplied comparator resizes the underlying resizable ArrayBuffer during sorting.
Root cause: js_typed_array_sort calls rqsort, then uses an index array (array_idx) to build the final sorted typed array. If the comparator function resizes the underlying ArrayBuffer during rqsort, the bounds checks performed in js_TA_cmp_generic can be bypassed (when the resize happens after large indices have already been moved into positions that appear valid during comparisons). After returning from rqsort, js_typed_array_sort proceeds with stale assumptions, and j = array_idx[i] may exceed the new backing buffer length; the subsequent copy from the temporary array using index j causes an out-of-bounds access.
Affected version: quickjs-ng/quickjs commit 537d004cd22b86373c262528c7e8076eaf76996d (tested on 2026-01-05).
Reproduction and ASAN crash details are publicly documented in: https://github.com/quickjs-ng/quickjs/issues/1297
Reporter credit: mcsky23 (Vlad Ionut Seba) |
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| Fonte | ⚠️ https://github.com/quickjs-ng/quickjs/issues/1297 |
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| Utilizador | mcsky23 (UID 94179) |
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| Submissão | 05/01/2026 16h17 (há 9 meses) |
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| Moderação | 09/01/2026 19h24 (4 days later) |
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| Estado | Aceite |
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| Entrada VulDB | 340356 [quickjs-ng quickjs até 0.11.0 quickjs.c js_typed_array_sort Excesso de tampão] |
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| Pontos | 20 |
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