CVE-2026-58049
High · 8.6CVSS
8.6
EPSS
0.5%
Published
Jun 28, 2026
CISA due date
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The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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