| Titel | GPAC up to commit f1219cde (2026-07-25) Memory Corruption |
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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_svg_attributes_copy in the file scenegraph/svg_attributes.c:6240 of the component MP4Box. The manipulation via a crafted MP4 file processed with the -nstatx argument leads to a heap-buffer-overflow read of size 20 from a 4-byte buffer. It is possible to launch the attack locally. User interaction is required.
Technical Details
- Affected file/function: scenegraph/svg_attributes.c:6240 / gf_svg_attributes_copy
- Vulnerable parameter: 4-byte buffer allocated by lsr_read_update_value_indexed (laser/lsr_dec.c:4994) read as 20 bytes by gf_svg_attributes_copy
- Attack vector: Local
- Privileges required: None
- Trigger condition: Processing a crafted MP4 file with "MP4Box -nstatx" causes gf_svg_attributes_copy to read 20 bytes from a 4-byte heap allocation, overreading by 16 bytes
Impact
- Confidentiality: Low
- 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 patch. Ensure buffer sizes allocated during LASeR decoding match the sizes expected by downstream SVG attribute copy operations. |
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| Quelle | ⚠️ https://github.com/r1ck9-2q/cve_summit/blob/main/Vuln%20GPAC%20MP4Box%20Heap-Buffer-Overflow%20READ%20size%2020%20in%20gf_svg_attributes_copy.md |
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| Benutzer | r1ck9 (UID 97869) |
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| Einreichung | 02.08.2026 17:27 (vor 1 Monat) |
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| Moderieren | 12.09.2026 21:39 (1 month later) |
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| Status | Akzeptiert |
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| VulDB Eintrag | 403192 [GPAC bis f1219cde MP4Box svg_attributes.c gf_svg_attributes_copy Denial of Service] |
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| Punkte | 20 |
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