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CVE PROGRAM SOURCE RECORD8.8 High

CVE-2026-58049

FFmpeg - Out-of-Bounds Write in RASC Decoder decode_dlta()

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Status
Published
Published
Updated
Assigning organization
VulnCheck

Description

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 products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

FFmpeg FFmpeg

Default version status: affected

  • 0 to ≤ bcd2c69e087a09b07cf45c6bd2428ee1ccb2925caffected

References