CVE-2026-58049 | 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
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.
- 🔗 github.com/bikini/exploitarium/tree/main/ffmpeg-rasc…
- 🔗 github.com/FFmpeg/FFmpeg/blob/master/libavcodec/rasc…
- 🔗 www.vulncheck.com/advisories/ffmpeg-out-of-bounds-write-in-…
- 🔗 access.redhat.com/errata/RHSA-2026:43711
- 🔗 access.redhat.com/errata/RHSA-2026:51180
- 🔗 access.redhat.com/errata/RHSA-2026:52832
- 🔗 access.redhat.com/errata/RHSA-2026:52833
- 🔗 access.redhat.com/errata/RHSA-2026:60520
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CVE-2026-58049 | 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
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