static int asf_read_marker(AVFormatContext *s, const GUIDParseTable *g)
{
    ASFContext *asf = s->priv_data;
    AVIOContext *pb = s->pb;
    uint64_t size   = avio_rl64(pb);
    int i, nb_markers, ret;
    size_t len;
    char name[1024];

    avio_skip(pb, 8);
    avio_skip(pb, 8); // skip reserved GUID
    nb_markers = avio_rl32(pb);
    avio_skip(pb, 2); // skip reserved field
    len = avio_rl16(pb);
    for (i = 0; i < len; i++)
        avio_skip(pb, 1);

    for (i = 0; i < nb_markers; i++) {
        int64_t pts;

        avio_skip(pb, 8);
        pts = avio_rl64(pb);
        pts -= asf->preroll * 10000;
        avio_skip(pb, 2); // entry length
        avio_skip(pb, 4); // send time
        avio_skip(pb, 4); // flags
        len = avio_rl32(pb);

        if ((ret = avio_get_str16le(pb, len, name,
                                    sizeof(name))) < len)
            avio_skip(pb, len - ret);
        avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pts,
                           AV_NOPTS_VALUE, name);
    }
    align_position(pb, asf->offset, size);

    return 0;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.