CVE-2026-58049
Gravedad CVSS v4.0:
ALTA
Tipo:
CWE-787
Escritura fuera de límites
Fecha de publicación:
28/06/2026
Última modificación:
30/06/2026
Descripción
*** Pendiente de traducción *** FFmpeg's RASC video decoder (decode_dlta in libavcodec/rasc.c) performs 32-bit reads and writes at the row cursor before the NEXT_LINE row-boundary check and validates the DLTA region in pixel rather than byte units, so a DLTA run on a PAL8 frame can access several bytes past the row allocation. A crafted media stream using the RASC FourCC, decoded by libavcodec, triggers a bitstream-controlled out-of-bounds heap write and adjacent out-of-bounds read, leading to memory corruption.
Impacto
Puntuación base 4.0
8.80
Gravedad 4.0
ALTA
Puntuación base 3.x
8.60
Gravedad 3.x
ALTA
Referencias a soluciones, herramientas e información
- https://github.com/FFmpeg/FFmpeg/blob/master/libavcodec/rasc.c
- https://github.com/bikini/exploitarium/tree/main/ffmpeg-rasc-dlta-calc-poc
- https://www.vulncheck.com/advisories/ffmpeg-out-of-bounds-write-in-rasc-decoder-decode-dlta
- https://access.redhat.com/security/cve/CVE-2026-58049
- https://bugzilla.redhat.com/show_bug.cgi?id=2493952
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-58049.json