CVE-2026-62250
Reporte público de vulnerabilidad
BAJA Exploit público detectado CVSS 5.5 / MEDIUM CWE-400GTN Risk Score
Monitoreo
Score calculado con CVSS, EPSS, CISA KEV, evidencia pública de exploit y vector de ataque.
Resumen ejecutivo
Resumen ejecutivo
LibreDWG is a free C library to read and write DWG files. Prior to 0.14.8413, a crafted pre-R13 DWG can make `decode_preR13_entities()` in `src/decode.c` enter a nonterminating loop that allocates a new object each iteration. `decode_preR13` in `src/decode_r11.c` computes `size` from the raw file-controlled `entities_start` and `entities_end` header bounds; the callee clamps `end` to `dat->size` but never recalculates `size`. At `end` of input, `bit_read_RC` and `bit_read_RS` stop advancing `dat->byte`, the overflow guard fails because `end` equals `dat->size`, and the no-advance check compares against `oldpos` saved before the loop instead of the previous iteration. This leaves repeated allocation of `dwg->object` entries until allocation fails or the process is OOM-killed, not merely a constant-memory CPU hang. The defect remains after the clamping and no-progress changes associated with the earlier issue 1131. Applications and tools calling `dwg_read_file()` on untrusted files, including `dwg2dxf`, `dwgread` and `dwg2svg`, can suffer denial of service when a user or automated pipeline opens a malformed file; no attacker credentials are required. This issue is fixed in repository nightly version 0.14.8413. Resumen de riesgo: CVE-2026-62250 presenta CVSS 5.5, severidad MEDIA, EPSS 0.17%, CISA KEV: No, exploit público detectado: Sí. Producto/proveedor asociado: No disponible / No disponible. Se recomienda validar exposición, revisar versiones afectadas, aplicar parche o mitigación disponible y monitorear actividad relacionada.
Indicadores
¿De qué se trata?
LibreDWG is a free C library to read and write DWG files. Prior to 0.14.8413, a crafted pre-R13 DWG can make `decode_preR13_entities()` in `src/decode.c` enter a nonterminating loop that allocates a new object each iteration. `decode_preR13` in `src/decode_r11.c` computes `size` from the raw file-controlled `entities_start` and `entities_end` header bounds; the callee clamps `end` to `dat->size` but never recalculates `size`. At `end` of input, `bit_read_RC` and `bit_read_RS` stop advancing `dat->byte`, the overflow guard fails because `end` equals `dat->size`, and the no-advance check compares against `oldpos` saved before the loop instead of the previous iteration. This leaves repeated allocation of `dwg->object` entries until allocation fails or the process is OOM-killed, not merely a constant-memory CPU hang. The defect remains after the clamping and no-progress changes associated with the earlier issue 1131. Applications and tools calling `dwg_read_file()` on untrusted files, including `dwg2dxf`, `dwgread` and `dwg2svg`, can suffer denial of service when a user or automated pipeline opens a malformed file; no attacker credentials are required. This issue is fixed in repository nightly version 0.14.8413.
Producto / proveedor
Fechas
Estado de explotación
Evidencia encontrada
| Fuente | Estado | Detalle | Confianza |
|---|---|---|---|
| NVD References | Referencia sospechosa/PoC | NVD contiene una referencia relacionada con PoC, exploit o repositorio público. | Media |
| NVD References | Referencia sospechosa/PoC | NVD contiene una referencia relacionada con PoC, exploit o repositorio público. | Media |
| NVD References | Referencia sospechosa/PoC | NVD contiene una referencia relacionada con PoC, exploit o repositorio público. | Media |
| NVD References | Referencia sospechosa/PoC | NVD contiene una referencia relacionada con PoC, exploit o repositorio público. | Media |
Nota: esta sección es referencial y defensiva. La ausencia de evidencia pública no garantiza que no exista explotación privada o no publicada.
¿Cómo superarlo / mitigarlo?
- Mantener monitoreo. La probabilidad actual de explotación es baja según EPSS.