| Titel | GPAC up to commit f1219cde (2026-07-25) NULL Pointer Dereference |
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| Beschreibung | A vulnerability was found in GPAC up to commit f1219cde (2026-07-25) and classified as problematic. Affected is the function gf_sg_mfurl_del in the file scenegraph/vrml_tools.c (line 916) of the component MP4Box. The manipulation via a crafted MP4 file processed with the -nstatx argument leads to a null pointer dereference. It is possible to launch the attack locally. User interaction is required.
Technical Details
- Affected file/function: scenegraph/vrml_tools.c:916 / gf_sg_mfurl_del
- Vulnerable parameter: embedded MPEG-4 BIFS scene graph node (SBVCAnimation URL field)
- Attack vector: Local
- Privileges required: None
- Trigger condition: Processing a crafted MP4 file with "MP4Box -nstatx" causes SBVCAnimation_Del to call gf_sg_mfurl_del which dereferences a NULL SFURL pointer during node teardown
Impact
- Confidentiality: None
- Integrity: None
- Availability: High
CVSS v3.1
Score: 5.5 (Medium)
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Timeline
- Discovered: 2026-07-27
- Vendor notified: 2026-07-27
- Patch released: 2026-07-28
- Public disclosure: 2026-07-27
Countermeasure
Apply the upstream fix. Add NULL pointer check in gf_sg_mfurl_del before dereferencing SFURL pointer. |
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| Quelle | ⚠️ https://github.com/r1ck9-2q/cve_summit/blob/main/Vuln-GPAC-MP4Box-gf_sg_mfurl_del-NULL-Pointer-Dereference.md |
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| Benutzer | r1ck9 (UID 97869) |
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| Einreichung | 01.08.2026 16:47 (vor 1 Monat) |
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| Moderieren | 12.09.2026 18:17 (1 month later) |
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| Status | Akzeptiert |
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| VulDB Eintrag | 403158 [GPAC bis f1219cde MP4Box scenegraph/vrml_tools.c gf_sg_mfurl_del Denial of Service] |
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| Punkte | 20 |
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