| Title | GPAC GPAC (MP4Box) gpac f1219cde (master, 2026-07-25) Use After Free |
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| Description | Description:
GPAC MP4Box at commit f1219cde contains a heap-use-after-free vulnerability during BT DEF/USE resolution. When gf_bt_sf_node fails to parse a malformed node, the error path unregisters and frees the partially constructed node but leaves its pointer in parser->def_nodes. A later DEF lookup calls gf_node_get_name with the dangling pointer.
Reproduction command:
./bin/gcc/MP4Box -add ../pocs/poc_3803 -new /tmp/out.mp4
Expected result:
AddressSanitizer reports a heap-use-after-free READ of size 8 in gf_node_get_name at scenegraph/base_scenegraph.c:1340.
Impact:
A crafted BT scene can crash MP4Box during DEF/USE name resolution and cause denial of service. Reuse of the freed heap region may create additional memory-corruption risk.
PoC:
https://github.com/Ech06/CVE_submit/blob/main/pocs/poc_3803
Issue:
https://github.com/gpac/gpac/issues/3803
Fix:
https://github.com/gpac/gpac/commit/9eb40df4448b88d6a6ce3454657c06f47eff0b24 |
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| Source | ⚠️ https://github.com/Ech06/CVE_submit/blob/main/gpac_3803.md |
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| User | Ech06 (UID 98792) |
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| Submission | 08/03/2026 16:55 (1 month ago) |
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| Moderation | 09/13/2026 15:37 (1 month later) |
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| Status | Accepted |
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| VulDB entry | 403299 [GPAC up to f1219cde MP4Box base_scenegraph.c gf_node_get_name use after free] |
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| Points | 20 |
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